How Earth’s plastic pollution problem could look by 2040



Rich Carey/Shutterstock

Costas Velis, University of Leeds and Ed Cook, University of Leeds

During a visit to a bookstore a few weeks ago, we couldn’t help but stare at a display unit featuring no fewer than ten books telling you how to rid plastics from your daily life. We’re bombarded by information on the topic of marine litter and plastic pollution, but how much do we really know about the problem?

Think about other planetary challenges, like climate change or ozone layer depletion. Mature areas of research have developed around them, allowing scientists to identify where the gases that cause these problems come from, and how much reaches the atmosphere each year.

But when it comes to plastic pollution, we know close to nothing about how and where plastic waste is generated, managed, treated and disposed of, especially in low and middle income countries. As a result, we’re struggling to limit the amount of litter accumulating in the environment.

Our research published in Science involved a herculean effort to spot, track and model the current and future flows of plastics into the world’s land and waterbodies. We found that plastic entering the marine environment is set to double by 2040 and, unless the world acts, more than 1.3 billion tonnes of plastic waste will be dumped on land and in waterbodies.

By identifying the ways in which this litter is produced and distributed, we’ve also discovered how best to reduce the plastic deluge. In the process, we found the unsung heroes on the frontline fighting the pollution crisis who could be the world’s best hope of stemming the tide.

Discarded face masks on a rocky beach.
Single-use plastic consumption has increased during the pandemic.
Fevziie/Shutterstock

The world’s plastic problem in numbers

We developed a model called Plastic-to-Ocean (P₂O) which combines years of accumulated knowledge on global flows of plastic. It compares our current production, use and management of waste with what is projected in the future.

Do you burn your waste in the garden or in the street? Do you drop it into the river? If you answered no to both of these questions then you are possibly one of the 5.5 billion people whose waste gets collected. If you were among the remaining two billion, what would you do with your uncollected waste? Would you make use of a nearby stream, cliff edge, or perhaps squirrel the odd bag in the woods after dusk?

More often than not, uncollected plastic waste is simply set on fire as a cost-free and effective method of disposal. Our model suggests that cumulatively, more than 2.2 billion tonnes of plastic will be open burned by 2040, far more than the 850 million tonnes that’s anticipated to be dumped on land and the 480 million tonnes in rivers and seas.

Having tracked the sources of plastic items through the supply chain and their fate in the environment, we explored what might help reduce aquatic pollution. We found that the single most effective intervention is to provide a service for the two billion people who currently don’t have their waste collected.

A graph showing how different measures could reduce the flow of plastic into the ocean.

Breaking the Plastic Wave, Author provided

But, of the nine interventions we tested, none solved the problem on their own. Only an integrated approach that in addition to increasing collection coverage includes interventions such as reducing demand for single-use and unrecyclable plastic and improving the business case for mechanical recycling, could be successful. For the countries suffering most from plastic pollution, this knowledge could offer a way forward.

But even in our best-case scenario, in which the world takes the kind of concerted and immediate action proposed in our study, approximately 710 million tonnes of plastic waste will be released into the environment by 2040. That may sound a lot, but it would mean an 80% reduction in the levels of plastic pollution compared to what will happen with no action over the next two decades.




Read more:
The ocean’s plastic problem is closer to home than scientists first thought


Could waste pickers save the day?

Our work also cast light on the contributions of 11 million waste pickers in low and middle-income countries. These informal workers collect waste items, including plastics, for recycling, to secure a livelihood for day-to-day survival. The model estimates that they may be responsible for 58% of all plastic waste collected for recycling worldwide – more than the combined formal collection services achieve throughout all the high-income countries put together.

Without this informal waste collection sector, the mass of plastic entering rivers and the ocean would be considerably greater. Their efforts should be integrated into municipal waste management plans, not only to recognise their tremendous contribution but to improve the appalling safety standards that they currently endure.

A man in India peddles a bicycle cart to collect rubbish.
An additional 500,000 people will need to be reached by waste collection services each day until 2040.
EPA-EFE/JAIPAL SINGH

Establishing a comprehensive baseline estimate of sources, stocks and flows of plastic pollution, and then projecting into the future, has been an immense task. When it comes to solid waste, the availability, accuracy and international compatibility of data is notoriously insufficient.

Plastic items occur throughout the world in tens of thousands of shapes, sizes, polymer types and additive combinations. There are also considerable differences in cultural attitudes towards the way waste is managed, how plastic products are consumed, and the types of infrastructure and equipment used to manage it when it becomes waste.

Our modelling effort was a delicate and tedious exercise of simplifying and generalising this complexity. To understand how reliable, accurate, and precise our findings are likely to be, think of the first models that estimated how sensitive the climate is to human influence back in the 1970s.

Hopefully, the strong evidence base we have presented today will inform a global strategy and strong local preventive action. The plastic pollution challenge can be substantially controlled within a generation’s time. So, is anyone ready to act?The Conversation

Costas Velis, Lecturer in Resource Efficiency Systems, University of Leeds and Ed Cook, Research Fellow in Circular Economy Systems, University of Leeds

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Waste not, want not: Morrison government’s $1b recycling plan must include avoiding waste in the first place



Mick Tsikas/AAP

Trevor Thornton, Deakin University

The federal government today announced A$190 million in funding for new recycling infrastructure, as it seeks to divert more than ten million tonnes of waste from landfill and create 10,000 jobs.

The plan, dubbed the Recycling Modernisation Fund, requires matching funding from the states and territories. The federal government hopes it will attract A$600 million in private investment, bringing the total plan to about A$1 billion.

The policy is a welcome step to addressing Australia’s waste crisis. In 2016-17, Australians generated 67 million tonnes of waste, and the volume is growing.

Australia’s domestic recycling industry cannot sort the types and volumes of materials we generate, and recent waste import bans in other countries mean our waste often has nowhere to go.

But recycling infrastructure alone is not enough to solve Australia’s waste problem. We must also focus on waste avoidance, reducing contamination and creating markets for recycled materials.

Waste avoidance is even more important than recycling.
Mick Tsikas/AAP

A home-grown problem

In early 2018, China began restricting the import of recyclables from many countries, including Australia, arguing it was too contaminated to recycle. Several other countries including India and Taiwan soon followed.

The move sent the Australian waste management industry into a spin. Recyclable material such as plastic, paper, glass and tyres was stockpiled in warehouses or worse, dumped in landfill.




Read more:
How recycling is actually sorted, and why Australia is quite bad at it


It was clear Australia needed to start processing more of its waste onshore, and pressure was on governments to find a solution. In 2019, state and federal governments announced a waste export ban.

Then came today’s announcement. In addition to the A$190 million for recycling infrastructure announced, the federal government will:

  • spend A$35 million on meeting its commitments under the National Waste Policy Action Plan

  • spend A$24.6 million on Commonwealth commitments to improve national waste data and determine if we’re meeting recycling targets

  • introduce new federal waste legislation to formalise the waste export ban and encourage companies to take responsibility for the waste they create.

But key questions remain: will the full funding package be delivered, and will it be spent where it’s needed?

Overseas bans on foreign waste pose a problem for Australia.
Fully Handoko/EPA

Clarity is needed

The Commonwealth says its funding is contingent on contributions from industry, states and territories. It’s not clear what happens to the plan if this co-funding does not eventuate.

Figures from the Australian Council of Recyclers shows state governments have not always been willing to spend on waste management. Of about A$2.6 billion in waste levies collected from businesses and households over the past two years, only 16.7% has been spent on waste, recycling and resource recovery.

There’s been a recent increase in the volume and type of materials placed into recycling and waste streams. But a lack of funding to date meant the industry struggled to manage these changes.

Some state governments have recently made positive moves towards spending on waste management infrastructure, and it’s not clear what the federal plan means for these commitments. Victoria, for example, has a A$300 million plan to transform the recycling sector. Will it now be asked to spend more?

Recycling infrastructure is not enough

The federal announcement made no mention of the three other pillars in successful waste management: waste avoidance, reducing contamination and creating markets for recycled materials.

The 2018 National Waste Policy says waste “avoidance” is the first principle in waste management, stating:

Prioritise waste avoidance, encourage efficient use, reuse and repair. Design products so waste is minimised, they are made to last and we can more easily recover materials.

States have collected billions in waste levies, but spent little on the problem.
Dave Hunt/AAP

Avoiding the generation of waste in the first place reduces the need for recycling. Waste avoidance also means we consume less resources, which is good for the planet and our economy.

Addressing contamination in our recycling streams is also vital. Contaminants include soft plastics, disposable nappies and textiles. If these items end up in this stream, recyclers must remove and dispose of them, adding time and costs to the process.

Addressing the contamination issue would also reduce the amount of new infrastructure required.

Public education and enforcement is urgently needed to reduce recycling contamination and increase waste avoidance, yet government action has been lacking in this area.

Businesses have great potential to reduce costs associated with managing waste. This includes reducing the waste of raw materials as well as improving the segregation of wastes and recyclables. Funding is desperately needed to help businesses implement these changes.

The federal government says the new funding could be used for small, portable waste-sorting facilities. This is a great idea. They could be located in rural and regional areas, and even at large events so materials can be effectively sorted at the source. This would make sorting more efficient and may also reduce the need for waste transport.




Read more:
Four bins might help, but to solve our waste crisis we need a strong market for recycled products


And of course, there’s no use producing recycled materials if no-one wants to buy them. Plenty of products could be produced using recycled glass, plastics, textiles and so on, but the practice in Australia is fairly limited. One promising example involves using glass and plastic in road bases.

Governments, business and even consumers can do more to demand that the products they buy contain a proportion of recycled materials, where its possible for a manufacturer to do so.

Why send material to landfill when it can be recycled?
AAP

A sustainable future

The government’s funding to improve waste data is welcome, and will allow improvements to the waste system to be accurately measured. Currently, many waste databases measure measure our recycling rate according to what goes into the recycling bins, rather than what actually ends up being recycled.

Spending to support actions under the National Waste Policy is also positive, as long as it spent primarily on reducing waste from being created in the first place.

Done right, better waste management can stimulate the economy and help improve the environment. Today’s announcement is a good step, but more detail is needed. Clearly though, it’s time for Australians to think more carefully about the materials we dispose of, and put them to better use.




Read more:
Recycling plastic bottles is good, but reusing them is better


The Conversation


Trevor Thornton, Lecturer, School of Life and Environmental Sciences, Deakin University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

After a storm, microplastics in Sydney’s Cooks River increased 40 fold



A litter trap in Cook’s River.
James HItchcock, Author provided

James Hitchcock, University of Canberra

Each year the ocean is inundated with 4.8 to 12.7 million tonnes of plastic washed in from land. A big proportion of this plastic is between 0.001 to 5 millimetres, and called “microplastic”.

But what happens during a storm, when lashings of rain funnel even more water from urban land into waterways? To date, no one has studied just how important storm events may be in polluting waterways with microplastics.




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Microplastic pollution is everywhere, but scientists are still learning how it harms wildlife


So to find out, I studied my local waterway in Sydney, the Cooks River estuary. I headed out daily to measure how many microplastics were in the water, before, during, and after a major storm event in October, 2018.

The results, published on Wednesday, were startling. Microplastic particles in the river had increased more than 40 fold from the storm.

Particles of plastic found in rivers. They may be tiny, but they’re devastating to wildlife in waterways.
Author provided

To inner west Sydneysiders, the Cooks River is known to be particularly polluted. But it’s largely similar to many urban catchments around the world.

If the relationship between storm events and microplastic I found in the Cooks River holds for other urban rivers, then the concentrations of microplastics we’re exposing aquatic animals to is far higher than previously thought.

14 million plastic particles

They may be tiny, but microplastics are a major concern for aquatic life and food webs. Animals such as small fish and zooplankton directly consume the particles, and ingesting microplastics has the potential to slow growth, interfere with reproduction, and cause death.

Determining exactly how much microplastic enters rivers during storms required the rather unglamorous task of standing in the rain to collect water samples, while watching streams of unwanted debris float by (highlights included a fire extinguisher, a two-piece suit, and a litany of tennis balls).

Back in the laboratory, a multi-stage process is used to separate microplastics. This includes floating, filtering, and using strong chemical solutions to dissolve non-plastic items, before identification and counting with specialised microscopes.

Litter caught in a trap in Cooks River. These traps aren’t effective at catching microplastic.
Author provided

In the days before the October 2018 storm, there were 0.4 particles of microplastic per litre of water in the Cooks River. That jumped to 17.4 microplastics per litre after the storm.

Overall, that number averages to a total of 13.8 million microplastic particles floating around in the Cooks River estuary in the days after the storm.




Read more:
Seafloor currents sweep microplastics into deep-sea hotspots of ocean life


In other urban waterways around the world scientists have found similarly high numbers of microplastic.

For example in China’s Pearl River, microplastic averages 19.9 particles per litre. In the Mississippi River in the US, microplastic ranges from 28 to 60 particles per litre.

Where do microplastics come from?

We know runoff during storms is one of the main ways pollutants such as sediments and heavy metals end up in waterways. But not much is known about how microplastic gets there.

However think about your street. Wherever you see litter, there are also probably microplastics you cannot see that will eventually work their way into waterways when it rains.




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Many other sources of microplastics are less obvious. Car tyres, for example, which typically contain more plastic than rubber, are a major source of microplastics in our waterways. When your tyres lose tread over time, microscopic tyre fragments are left on roads.

Did you know your car tyres can be a major source of microplastic pollution?
Shutterstock

Microplastics may even build up on roads and rooftops from atmospheric deposition. Everyday, lightweight microplastics such as microfibres from synthetic clothing are carried in the wind, settling and accumulating before they’re washed into rivers and streams.

What’s more, during storms wastewater systems may overflow, contaminating waterways. Along with sewage, this can include high concentrations of synthetic microfibers from household washing machines.

And in regional areas, microplastics may be washing in from agricultural soils. Sewage sludge is often applied to soils as it is rich in nutrients, but the same sludge is also rich in microplastics.

What can be done?

There are many ways to mitigate the negative effects of stormwater on waterways.

Screens, traps, and booms can be fitted to outlets and rivers and catch large pieces of litter such as bottles and packaging. But how useful these approaches are for microplastics is unknown.

Raingardens and retention ponds are used to catch and slow stormwater down, allowing pollutants to drop to bottom rather than being transported into rivers. Artificial wetlands work in similar ways, diverting stormwater to allow natural processes to remove toxins from the water.

Almost 14 million plastic particles were floating in Cooks River after a storm two years ago.
Shutterstock

But while mitigating the effects of stormwater carrying microplastics is important, the only way we’ll truly stop this pollution is to reduce our reliance on plastic. We must develop policies to reduce and regulate how much plastic material is produced and sold.

Plastic is ubiquitous, and its production around the world hasn’t slowed, reaching 359 million tonnes each year. Many countries now have or plan to introduce laws regulating the sale or production of some items such as plastic bags, single-use plastics and microbeads in cleaning products.




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We have no idea how much microplastic is in Australia’s soil (but it could be a lot)


In Australia, most state governments have committed to banning plastic bags, but there are still no laws banning the use of microplastics in cleaning or cosmetic products, or single-use plastics.

We’ve made a good start, but we’ll need deeper changes to what we produce and consume to stem the tide of microplastics in our waterways.The Conversation

James Hitchcock, Post-Doctoral Research Fellow, University of Canberra

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Seafloor currents sweep microplastics into deep-sea hotspots of ocean life



A rockfish hides in a red tree coral in the deep sea.
Geofflos

Ian Kane, University of Manchester and Michael Clare, National Oceanography Centre

What if the “great ocean garbage patches” were just the tip of the iceberg? While more than ten million tonnes of plastic waste enters the sea each year, we actually see just 1% of it – the portion that floats on the ocean surface. What happens to the missing 99% has been unclear for a while.

Plastic debris is gradually broken down into smaller and smaller fragments in the ocean, until it forms particles smaller than 5mm, known as microplastics. Our new research shows that powerful currents sweep these microplastics along the seafloor into large “drifts”, which concentrate them in astounding quantities. We found up to 1.9 million pieces of microplastic in a 5cm-thick layer covering just one square metre – the highest levels of microplastics yet recorded on the ocean floor.

While microplastics have been found on the seafloor worldwide, scientists weren’t sure how they got there and how they spread. We thought that microplastics would separate out according to how big or dense they were, in a similar manner to natural sediment. But plastics are different – some float, but more than half of them sink.




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Pristine Antarctic fjords contain similar levels of microplastics to open oceans near big civilisations


Plastics which once floated can sink as they become coated in algae, or if bound up with other sticky minerals and organic matter. Recent research has shown that rivers transport microplastics to the ocean too, and laboratory experiments revealed that giant underwater avalanches of sediment can transport these tiny particles along deep-sea canyons to greater depths.

We’ve now discovered how a global network of deep-sea currents transports microplastics, creating plastic hotspots within vast sediment drifts. By catching a ride on these currents, microplastics may be accumulating where deep-sea life is abundant.

Once plastic debris has broken down and sinks to the ocean floor, currents sweep the particles into vast drifts.
Ian Kane, Author provided

From bedroom floors to the seafloor

We surveyed an area of the Mediterranean off the western coast of Italy, known as the Tyrrhenian Sea, and studied the bottom currents that flow near the seafloor. These currents are driven by differences in water salinity and temperature as part of a system of ocean circulation that spans the globe. Seafloor drifts of sediment can be many kilometres across and hundreds of metres high, forming where these currents lose their strength.

We analysed sediment samples from the seafloor taken at depths of several hundred metres. To avoid disturbing the surface layer of sediment, we used samples taken with box-cores, which are like big cookie cutters. In the laboratory, we separated microplastics from the sediment and counted them under microscopes, analysing them using infra-red spectroscopy to find out what kinds of plastic polymer types were there.

A microplastic fibre seen under a microscope.
Ian Kane, Author provided

Most microplastics found on the seafloor are fibres from clothes and textiles. These are particularly insidious, as they can be eaten and absorbed by organisms. Although microplastics on their own are often non-toxic, studies show the build-up of toxins on their surfaces can harm organisms if ingested.

These deep ocean currents also carry oxygenated water and nutrients, meaning that the seafloor hotspots where microplastics accumulate may also be home to important ecosystems such as deep-sea coral reefs that have evolved to depend on these flows, but are now receiving huge quantities of microplastics instead.

What was once a hidden problem has now been uncovered – natural currents and the flow of plastic waste into the ocean are turning parts of the seafloor into repositories for microplastics. The cheap plastic goods we take for granted eventually end up somewhere. The clothes that may only last weeks in your wardrobe linger for decades to centuries on the seafloor, potentially harming the unique and poorly understood creatures that live there.The Conversation

Ian Kane, Reader in Geology, University of Manchester and Michael Clare, Principal Researcher in Marine Geoscience, National Oceanography Centre

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Using lots of plastic packaging during the coronavirus crisis? You’re not alone


Daiane Scaraboto, University of Melbourne; Alison M Joubert, The University of Queensland, and Claudia Gonzalez-Arcos, The University of Queensland

In eight years, US environmentalist and social media star Lauren Singer had never sent an item of rubbish to landfill. But last month, in an impassioned post to her 383,000 Instagram followers, she admitted the reality of COVID-19 has changed that.

I sacrificed my values and bought items in plastic. Lots of it, and plastic that I know isn’t recyclable in NYC (New York City) recycling or maybe even anywhere … why would I go against something that I have actively prioritised and promoted?

Singer wrote that as the seriousness of COVID-19 dawned, she stocked up on items she’d need if confined to her home for a long period – much of it packaged in plastic.

Her confession encapsulates how the pandemic has challenged those of us who are trying to reduce our waste. Many sustainability-conscious people may now find themselves with cupboards stocked with plastic bottles of hand sanitiser, disposable wipes and takeaway food containers.

So let’s look at why this is happening, and what to do about it.

Sustainability out the window

We research how consumers respond to change, such as why consumers largely resisted single-use plastic bag bans. Recently we’ve explored how the coronavirus has changed the use of plastic bags, containers and other disposable products.

Amid understandable concern over health and hygiene during the pandemic, the problem of disposable plastics has taken a back seat.

For example, Coles’ home delivery service is delivering items in plastic bags (albeit reusable ones) and many coffee shops have banned reusable mugs, including global Starbucks branches.




Read more:
For decades, scientists puzzled over the plastic ‘missing’ from our oceans – but now it’s been found


Restaurants and other food businesses can now only offer home delivery or takeaway options. Many won’t allow customers to bring their own containers, defaulting to disposables which generate plastic waste. This means many consumers can’t reduce their plastic waste, even if they wanted to.

Demand for products such as disposable wipes, cleaning agents, hand sanitiser, disposable gloves and masks is at a record high. Unfortunately, they’re also being thrown out in unprecedented volumes.

And the imperative to prevent the spread of coronavirus means tonnes of medical waste is being generated. For example, hospitals and aged care facilities have been advised to double-bag clinical waste from COVID-19 patients. While this is a necessary measure, it adds to the plastic waste problem.

Many cafes will not accept reusable cups during the health crisis.
The Conversation

Cause for hope

Sustainability and recycling efforts are continuing. Soft plastics recycler Red Cycle is still operating. However many dropoff points for soft plastics, such as schools and council buildings, are closed, and some supermarkets have removed their dropoff bins.

Boomerang Alliance’s Plastic Free Places program has launched a guide for cafes and restaurants during COVID-19. It shows how to avoid single-use plastics, and what compostable packaging alternatives are available.

As the guide notes, “next year the coronavirus will hopefully be a thing of the past but plastic pollution won’t be. It’s important that we don’t increase plastic waste and litter in the meantime.”

Old habits die hard

In the US, lobbyists for the plastic industry have taken advantage of health fears by arguing single-use plastic bags are a more hygienic option than reusable ones. Plastic bag bans have since been rolled back in the US and elsewhere.

However, there is little evidence to show plastic bags are a safer option, and at least reusable cloth bags can be washed.

A relaxation on plastic bag bans – even if temporary – is likely to have long-term consequences for consumer behaviour. Research shows one of the biggest challenges in promoting sustainable behaviours is to break old habits and adopt new ones. Once people return to using plastic bags, the practice becomes normalised again.

In Europe, the plastic industry is using the threat of coronavirus contamination to push back against a ban on single-use plastics such as food containers and cutlery.

Such reframing of plastic as a “protective” health material can divert attention from its dangers to the environment. Prior research, as well as our preliminary findings, suggest these meanings matter when it comes to encouraging environmentally friendly behaviours.




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Many people are using their time at home to clear out items they no longer need. However, most second-hand and charity shops are closed, so items that might have had a second life end up in landfill.

Similarly, many tool, book and toy libraries are closed, meaning some people will be buying items they might otherwise have borrowed.

Once consumers go back to using plastic bags, it will take time to break the habit again.
Darren England/AAP

What to do

We can expect the environmental cause will return to the foreground when the COVID-19 crisis has passed. In the meantime, reuse what you have, and try to store rather than throw out items for donation or recycling.

Talk to takeaway food outlets about options for using your own containers, and refuse disposable cutlery or napkins with deliveries. Use the time to upskill your coffee-making at home rather than buying it in a takeaway cup. And look for grocery suppliers offering more sustainable delivery packaging, such as cardboard boxes or biodegradable bags.

Above all, be vigilant about ways environmental protections such as plastic bag bans might be undermined during the pandemic, and voice your concerns to politicians.




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The Conversation


Daiane Scaraboto, Associate Professor of Marketing, University of Melbourne; Alison M Joubert, Lecturer in Marketing, The University of Queensland, and Claudia Gonzalez-Arcos, Lecturer in Marketing, The University of Queensland

This article is republished from The Conversation under a Creative Commons license. Read the original article.

For decades, scientists puzzled over the plastic ‘missing’ from our oceans – but now it’s been found


Britta Denise Hardesty, CSIRO and Chris Wilcox, CSIRO

You’ve probably heard that our oceans have become a plastic soup. But in fact, of all the plastic that enters Earth’s oceans each year, just 1% has been observed floating on the surface. So where is the rest of it?

This “missing” plastic has been a longstanding scientific question. To date, the search has focused on oceanic gyres such as the Great Pacific Garbage Patch, the water column (the part of the ocean between the surface and the sea bed), the bottom of the ocean, and the stomachs of marine wildlife.

But our new research suggests ocean plastic is being transported back onshore and pushed permanently onto land away from the water’s edge, where it often becomes trapped in vegetation.

Of course, plastic has been reported on beaches around the world for decades. But there has been little focus on why and how coastal environments are a sink for marine debris. Our findings have big implications for how we tackle ocean plastic.

New research shows a significant amount of plastic pollution from our oceans ends up back on land, where it gets trapped.

The hunt for marine pollution

Our separate, yet-to-be-published research has found around 90% of marine debris that enters the ocean remains in the “littoral zone” (the area of ocean within 8km of the coast). This new study set out to discover what happens to it.

We collected data on the amount and location of plastic pollution every 100 kilometres around the entire coast of Australia between 2011 and 2016. Debris was recorded at 188 locations along the Australian coastline. Of this, 56% was plastic, followed by glass (17%) and foam (10%).

Data was recorded approximately every 100 kilometres along the coast of Australia. Of the marine debris recorded, more than half was plastic.

The debris was a mix of litter from people and deposition from the ocean. The highest concentrations of plastic pollution were found along coastal backshores – areas towards the inland edge of the beach, where the vegetation begins. The further back from the water’s edge we went, the more debris we found.

The amount of marine debris, and where it ends up, is influenced by onshore wave activity and, to a lesser extent, wind activity. Densely populated areas and those where the coast was easily accessible were hotspots for trapped plastics.




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Think about what you see on your beach. Smaller debris is often found near the water’s edge, while larger items such as drink bottles, plastic bags and crisp packets are often found further back from the water, often trapped in vegetation.

We also found more debris near urban areas where rivers and creeks enter the ocean. It could be that our trash is being trapped by waterways before it gets to the sea. We’re finding similar patterns in other countries we’re surveying around the Asia Pacific and beyond.

This pollution kills and maims wildlife when they mistake it for food or get tangled in it. It can damage fragile marine ecosystems by smothering sensitive reefs and transporting invasive species and is potentially a threat to human health if toxins in plastics make their way through the food chain to humans.

It can also become an eyesore, damaging the economy of an area through reduced tourism revenue.

Onshore waves, wind and areas with denser human populations influences where and how much marine debris there is along our coastlines.
CSIRO

Talking rubbish

Our findings highlight the importance of studying the entire width of coastal areas to better understand how much, and where, debris gets trapped, to inform targeted approaches to managing all this waste.

Plastic pollution can be reduced through local changes such as water refill stations, rubbish bins, incentives and awareness campaigns. It can also be reduced through targeted waste management policies to reduce, reuse and recycle plastics. We found container deposit schemes to be a particularly effective incentive in reducing marine pollution.




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This discussion is particularly timely. The National Plastics Summit in Canberra last week brought together governments, industry and non-government organisations to identify new solutions to the plastic waste challenge, and discuss how to meet targets under the National Waste Policy Action Plan. Understanding that so much of our debris remains local, and trapped on land, provides real opportunities for successful management of our waste close to the source. This is particularly critical given the waste export ban starting July 1 at the latest.

Plastic in our oceans is increasing. It’s clear from our research that waste management strategies on land must accommodate much larger volumes of pollution than previously estimated. But the best way to keep plastic from our ocean and land is to stop putting it in.

Arianna Olivelli contributed to this article, and the research upon which it was based.




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The Conversation


Britta Denise Hardesty, Principal Research Scientist, Oceans and Atmosphere Flagship, CSIRO and Chris Wilcox, Senior Research Scientist, CSIRO

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Morrison government will use purchasing power to encourage plastics recycling


Michelle Grattan, University of Canberra

The Morrison government will use its procurement policy to encourage the recycling of plastics, as well as committing financial assistance for upgrading infrastructure to boost the capacity for this waste to be reused.

Scott Morrison will announce the initiatives to a national conference in Canberra on Monday that is looking at the challenge of dealing with this escalating and environmentally destructive problem. The meeting is attended by industry, government and community representatives.

The prime minister, who has previously highlighted better management of plastics waste as a priority for his government, will emphasise that for major change “the only way forward is in partnership – working with our neighbours; state, territory and local governments; industry, our manufacturing sector and supermarkets; waste operators, and with consumers and communities”.

In a speech circulated ahead of delivery he proposes “three pillars” for tackling the problem: taking responsibility for the waste; encouraging demand for recycled products; and expanding industry capability.

Plastics “are choking our oceans. Scientists estimate that in just 30 years’ time the weight of plastics in our oceans will exceed the weight of fish in our oceans. That’s appalling.

“Taking responsibility means recognising the problems we are contributing to – and it also means keeping faith with the Australian people who recycle,” Morrison says.

“Only 12% of plastic put out in the yellow bin for recycling is actually recycled. Australians don’t expect their waste to be exported to someone’s village or waterway.”

Morrison will meet state and territory leaders at the Council of Australian Governments (COAG) next month to finalise a ban on the export of waste plastic, paper, glass and tyres.

He stresses this isn’t to ban the export of value-added recyclable materials.

Morrison says more investment is much needed in the recycling industry; this and collection systems are under “severe strain”. Investment is needed in “technological innovation that maximises the value of the recycled product and minimises the costs as well”. Only 8% of the $2.6 billion states and territories collected in waste levies over 2018-19 has been reinvested in infrastructure and technology.

“The Commonwealth stands ready to co-invest in these critical facilities with state and territory governments, and with industry”, he says. “We will invest with governments and with industry on a 1 to 1 to 1 basis.” Details will come closer to the May budget, Morrison said.

The waste sector employs 50,000 and generates more than $15 billion annually, Morrison says.

“For every 10,000 tonnes of waste sent to landfill, 2.8 direct jobs are created. But if we recycle the same waste, 9.2 direct jobs are created.

“According to the Australian Council of Recycling, recycling more domestically could create more than 5,000 new jobs.”

With a ban on waste plastic being exported, there will be more in Australia to reuse – which means finding ways of encouraging demand for recycled products. Both industry and government need to do this, Morrison says.

As the first of a number of measures the government will take, its procurement guidelines will be rewritten “to make sure every procurement undertaken by a Commonwealth agency considers environmental sustainability and use of recycled content as a factor in determining value for money”.

He instanced a number of examples of innovative recycling, These included “recycled plastic into asphalt … a one kilometre, two-lane stretch [of road] uses up to half a million plastic bags”, as well as into picnic tables, bollards and gardening products.The Conversation

Michelle Grattan, Professorial Fellow, University of Canberra

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Four bins might help, but to solve our waste crisis we need a strong market for recycled products


Jenni Downes, Monash University

Australia is still grappling with what to do with the glut of recyclable material after China closed most of its market to our recycling in 2018.

Now the Victorian government has released the first major change to state recycling policy: a consistent kerbside four bin system by 2030, and a container deposit scheme.

So what’s the proposed new kerbside bin system, and will it help alleviate Australia’s recycling crisis? Here’s what you need to know about the extra bin coming your way.




Read more:
China’s recycling ‘ban’ throws Australia into a very messy waste crisis


The problems with our recycling system

There are two big problems – particularly since the China ban.

One is about supply. The quality of materials we have for recycling is quite poor, partly from the design of the products, and partly how we collect and sort waste items.

The other is demand. There’s not enough demand for recycled materials in new products or infrastructure, and so the commodity value of the materials, even high quality, is low.

And even though many of us think we’re good at recycling, many households aren’t getting recycling exactly right because they put things that don’t belong in the recycling bin, such as soft plastics.

One reason is because of the confusion about what can be recycled, where and when. A standardised system of collection (no matter how many bins) will go a long way to improving this, and the most exciting aspect of the Victorian announcement is the strong leadership towards consistency across the state.




Read more:
Don’t just blame government and business for the recycling crisis – it begins with us


This means by 2030, no matter where Victorians live or visit, they’ll have a consistent kerbside bin system.

But to boost our recycling capacity, we need consistency across the country. New South Wales, South Australian and Western Australian governments are already supporting combined food and garden organics bins, and other states are likely to follow as the evidence of the benefits continues to accumulate.

What will change?

Details are still being ironed out, but essentially, the new system expands the current two or three bins most Victorian houses have to four bins.

While paper, cardboard and plastic or metal containers will still go in the yellow bin, glass containers will now have their own separate purple bin (or crate). A green bin, which some Victorians already have for garden vegetation, will expand to collect food scraps.

Victoria’s 4 bin plans.
Adapted by author from vic.gov.au/four-bin-waste-and-recycling-system

The purple bin will come first, with the gradual roll-out starting next year as some Victorian councils’ existing collection contracts come to a close. The service is expected to be fully in place by 2027 (some remote areas may be exempt).

And the expanded green bin service accepting food scraps for composting will be rolled out by 2030, unless councils choose to move earlier (some are already doing so).

How extra bins will make a difference

A 2015 report on managing household waste in Europe showed separating our waste increases the quality of material collected. Some countries even have up to six bins (or crates, or sacks).

That’s because it’s easier for people to sort out the different materials than for machines, particularly food and the complex packaging we have today.

A separate bin for food (plus garden organics) will help recover Victoria’s share of the 2.5 million tonnes of food and scraps Australian households chuck out each year.




Read more:
Melbourne wastes 200 kg of food per person a year: it’s time to get serious


And a separate bin for glass will help with glass breaking in the yellow bin or collection truck, contaminating surrounding paper and cardboard with tiny glass shards that renders them unrecyclable. It should also boost how much glass gets recycled, according to Australia’s largest glass reprocesser.

Most Melbourne households have only two bins: one for mixed recycling and the other for general waste.
Shutterstock

What do they need to get right?

To make sure the transition to the new system is smooth, councils and the Victorian government must consider:

  • the space needed for four bins

Not everyone has enough space (inside or outside). This may require creative council and household solutions like those already found overseas (stackable crates and segregated bins).

  • the collection schedule

Does the new purple bin mean we’ll see a another truck, or perhaps a special multi-compartment recycling truck? And once councils have food waste in a weekly green bin, will the red bin collection go fortnightly? This actually makes sense because 3560% of the red bin is food scraps, which will be gone.

  • correct disposal of food waste

Many councils that have already added food waste to the green bin report contamination issues as people get their head around the transition, such as putting food wrappers in with the food scraps.

  • correct sorting of recycling

Putting the wrong thing in the recycling bin is a problem across the country, and taking glass out of the yellow bin won’t solve this issue. While this is already being tackled in government campaigns and council trials, we’ll likely need more government effort at both a systems and household level.

Five things never to put in a recycling bin.
Sustainability Victoria, sustainability.vic.gov.au/recycling

Better collection won’t mean much without demand

Collection is only one piece of the puzzle. Government support is needed to make sure all this recycling actually ends up somewhere. Efforts to improve the “supply-side” aspects of recycling can go to waste if there’s no demand for the recycled materials.

Environmental economists have long pointed out that without government intervention, free markets in most countries will not pay enough or use enough recycled material when new, or “virgin”, materials are so cheap.




Read more:
Only half of packaging waste is recycled – here’s how to do better


What’s great for Victoria is the new four bin system is only one pillar of the state’s new recycling policy.

It also includes many demand-side initiatives, from market development grants and infrastructure funding, to developing a Circular Economy Business Innovation Centre. The policy also deems waste management to be an “essential service” and has left space for strong procurement commitments. Today, Prime Minister Scott Morrison acknowledged the importance of procurement when he announced an overhaul of the Commonwealth Procurement Guidelines at the National Plastics Summit, to boost demand for recycled products.

Stepping up to the challenge

But to effectively combat Australia’s recycling crisis, more must be done. This includes reinvestment of landfill levies; standards for recycled materials, and at a federal level; clear strategies to improve product design ; and funding to support the waste and recycling industry to meet the export ban.




Read more:
A crisis too big to waste: China’s recycling ban calls for a long-term rethink in Australia


We also need regulation on the use of recycled material in products. For example, through mandated targets or fiscal policies like a tax on products made from virgin materials.

Since 2018 when China stopped taking most of our recycling, the level of industry, community and media interest has created a strong platform for policy change. It’s exciting to see Victoria responding to the challenge.The Conversation

Jenni Downes, Research Fellow, BehaviourWorks Australia (Monash Sustainable Development Institute), Monash University

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Climate explained: seven reasons to be wary of waste-to-energy proposals



Many developed countries already have significant waste-to-energy operations and therefore less material going to landfill.

Jeff Seadon, Auckland University of Technology


CC BY-ND

Climate Explained is a collaboration between The Conversation, Stuff and the New Zealand Science Media Centre to answer your questions about climate change.

If you have a question you’d like an expert to answer, please send it to climate.change@stuff.co.nz

I was in Switzerland recently and discovered that they haven’t had any landfill since the early 2000s, because all of their waste is either recycled or incinerated to produce electricity. How “green” is it to incinerate waste in order to produce electricity? Is it something New Zealand should consider, so that 1) we have no more landfill, and 2) we can replace our fossil-fuel power stations with power stations that incinerate waste?

Burning rubbish to generate electricity or heat sounds great: you get rid of all your waste and also get seemingly “sustainable” energy. What could be better?

Many developed countries already have significant “waste-to-energy” incineration plants and therefore less material going to landfill (although the ash has to be landfilled). These plants often have recycling industries attached to them, so that only non-recyclables end up in the furnace. If it is this good, why the opposition?

Here are seven reasons why caution is needed when considering waste-to-energy incineration plants.




Read more:
Why municipal waste-to-energy incineration is not the answer to NZ’s plastic waste crisis


Stifling innovation and waste reduction

  1. Waste-to-energy plants require a high-volume, guaranteed waste stream for about 25 years to make them economically viable. If waste-to-energy companies divert large amounts of waste away from landfills, they need to somehow get more waste to maintain their expensive plants. For example, Sweden imports its waste from the UK to feed its “beasts”.

  2. The waste materials that are easiest to source and have buyers for recycling – like paper and plastic – also produce most energy when burned.

  3. Waste-to-energy destroys innovation in the waste sector. As a result of China not accepting our mixed plastics, people are now combining plastics with asphalt to make roads last longer and are making fence posts that could be replacing treated pine posts (which emit copper, chrome and arsenic into the ground). If a convenient waste-to-energy plant had been available, none of this would have happened.

  4. Waste-to-energy reduces jobs. Every job created in the incineration industry removes six jobs in landfill, 36 jobs in recycling and 296 jobs in the reuse industry.

  5. Waste-to-energy works against a circular economy, which tries to keep goods in circulation. Instead, it perpetuates our current make-use-dispose mentality.

  6. Waste-to-energy only makes marginal sense in economies that produce coal-fired electricity – and then only as a stop-gap measure until cleaner energy is available. New Zealand has a green electricity generation system, with about 86% already coming from renewable sources and a target of 100% renewable by 2035, so waste-to-energy would make it a less renewable energy economy.

  7. Lastly, burning waste and contaminated plastics creates a greater environmental impact than burning the equivalent oil they are made from. These impacts include the release of harmful substances like dioxins and vinyl chloride as well as mixtures of many other harmful substances used in making plastics, which are not present in oil.




Read more:
Circular fashion: turning old clothes into everything from new cotton to fake knees


Landfills as mines of the future

European countries were driven to waste-to-energy as a result of a 2007 directive that imposed heavy penalties for countries that did not divert waste from landfills. The easiest way for those countries to comply was to install waste-to-energy plants, which meant their landfill waste dropped dramatically.

New Zealand does not have these sorts of directives and is in a better position to work towards reducing, reusing and recycling end-of-life materials, rather than sending them to an incinerator to recover some of the energy used to make them.

Is New Zealand significantly worse than Europe in managing waste? About a decade ago, a delegation from Switzerland visited New Zealand Ministry for the Environment officials to compare progress in each of the waste streams. Both parties were surprised to learn that they had managed to divert roughly the same amount of waste from landfill through different routes.

This shows that it is important New Zealand doesn’t blindly follow the route other countries have used and hope for the same results. Such is the case for waste-to-energy.

There is also an argument to be made for current landfills. Modern, sanitary landfills seal hazardous materials and waste stored over the last 50 years presents future possibilities of landfill mining.

Many landfills have higher concentrations of precious metals, particularly gold, than mines and some are being mined for those metals. As resources become scarcer and prices increase, our landfills may become the mines of the future.The Conversation

Jeff Seadon, Senior Lecturer, Auckland University of Technology

This article is republished from The Conversation under a Creative Commons license. Read the original article.

Why municipal waste-to-energy incineration is not the answer to NZ’s plastic waste crisis



Since the Chinese plastic recycling market closed, 58% of New Zealand’s plastic waste goes to countries in South-East Asia.
from http://www.shutterstock.com, CC BY-ND

Trisia Farrelly, Massey University

New Zealand is ranked the third-most-wasteful country in the OECD. New Zealanders produce five times the global daily average of waste per person – and they are getting more wasteful, producing 35% more than a decade ago.

These statistics are likely to get worse following China’s 2018 ban on imports of certain recyclable products. China was the world’s top importer of recyclable plastics, but implemented the ban because it could no longer safely manage its domestic and imported waste. Unsurprisingly, in 2015, China was named the top source of marine plastic pollution in the world.

Since the Chinese market closed, 58% of New Zealand’s plastic waste now goes to Malaysia, Indonesia, the Philippines, Thailand and Vietnam — all countries with weak regulations and high rankings as global sources of marine plastic pollution.

Waste-to-energy (WtE) incineration has been raised as a solution. While turning plastic waste into energy may sound good, it creates more pollution and delays a necessary transition to a circular economy.




Read more:
We need a legally binding treaty to make plastic pollution history


Dirty plastics

Shipments of plastic recycling often arrive in developing countries unsorted and contaminated. Materials that cannot be easily recycled are commonly burned, releasing dioxins into air, soil and water. In response, South-East Asian countries have started returning dirty plastics to developed countries.

Several New Zealand councils have stopped collecting certain plastics for recycling offshore. They are sending them to landfill instead. Available data suggest that even before the China ban plastics made up roughly 15% of the waste in municipal landfills – about 250,000 tonnes a year. Much of this is imported plastic packaging.

Many New Zealanders are very or extremely worried about the impact of plastic waste. We cannot continue ignoring our role in the global plastic pollution crisis while dumping plastic in homegrown landfills or in developing countries.




Read more:
We organised a conference for 570 people without using plastic. Here’s how it went


In the scramble to find alternatives, waste-to-energy (WtE) incineration has become a hot topic, particularly as foreign investors look to establish WtE incinerators on the West Coast and [other centres]in New Zealand. Some local government representatives have endorsed WtE proposals, or raised WtE as an election issue.

Less plastic good for climate

Like landfills, WtE incinerators symbolise the linear “take-make-waste” economy, which destroys valuable resources and perpetuates waste generation.

Globally, countries are moving to circular approaches instead, which follow the “zero waste hierarchy”. This prioritises waste prevention, reduction, reuse, recycling and composting and considers WtE unacceptable.

Some New Zealanders say Nordic countries have proven that incineration is the environmental silver bullet to our waste woes. But a recent study found these countries will not meet EU circular economy goals unless they replace WtE incineration with policies that reduce waste generation. Such policies include packaging taxes, recycling and recovery rate targets, landfill bans on biodegradable waste, deposit return schemes and extended producer responsibility.

Rejecting linear approaches is also good for the climate. Actions at the top of the waste hierarchy stop more greenhouse gases than those at the bottom.

In contrast, WtE incinerators can produce 1.2 tonnes of carbon dioxide per tonne of municipal solid waste burnt. New Zealand’s zero carbon act means we have a responsibility to ensure we do not increase our greenhouse gas emissions by investing in WtE incineration.

Incinerators also cannot magic away toxins in plastic waste. Even the most high-tech WtE incinerators [[release dioxins and other pollutants into the air]. Meanwhile, toxin-laden fly ash and slag are dumped in landfills to eventually leach into the environment and contaminate food systems.

Shifting responsibility for plastic waste

To address plastic pollution, it is easy to see how prevention and reduction work better than “getting rid of” plastic once produced. Many WtE proponents argue that incineration technology can be a temporary solution for the plastic waste we have already created.

But incinerators are not short-term fixes. They are expensive to build and maintain. Large-scale incinerators demand about 100,000 tonnes of municipal solid waste a year, encouraging increasing production of waste. Investors guarantee returns on their investment by locking councils into decades-long contracts.

The only real solution to our plastics problem is through regulation that moves New Zealand towards a circular economy. We can start by making the linear economy expensive by increasing landfill levies above the current $NZ10/tonne and expanding it to all landfills. We must also invest in better waste collection, sorting and recycling systems, including a national network of resource recovery centres.

Instead of burning or burying plastic that cannot be reused, recycled or composted, we can prevent or reduce it through targeted phase-outs. The government is proposing to regulate single-use plastic packaging, beverage packaging, electronic waste and farm plastics through mandatory product stewardship schemes. This would make manufacturers responsible for the waste they produce and provide incentives for less wasteful and toxic product design and delivery systems (e.g. refill stations).

All of these circular solutions will provide far more jobs than WtE incineration.

Without a swift, brave shift to a circular economy, New Zealand will remain one of the world’s most wasteful nations. Circular economies are developing globally and WtE incineration will only set us back by 30 years.


Hannah Blumhardt, the coordinator of the NZ Product Stewardship Council, has contributed to this article.The Conversation

Trisia Farrelly, Senior Lecturer, Massey University

This article is republished from The Conversation under a Creative Commons license. Read the original article.