Hi all. It has probably become obvious to anyone that may have been following this Blog for some time that posts have become few and far between of late. I think I have more-or-less struggled over the years with times of poor health, but no more so than the current time. It is a many faceted problem and I won’t go into all of the details. Essentially, something needs to change (or a number of things really). Being still at work and clearly needing to continue to work in order to feed myself, etc, sadly it has beome time to change the way I do things around my many Blogs, etc. I have always enjoyed being online and keeping blogs and websites ticking over, but it has now become an almost impossible chore.
What will change is that this Blog will remain up as an archive, while also providing a gateway (via a link) to my Facebook Page (Kevin’s Wilderness Journeys), where I hope to continue posting curated articles/links/reviews, etc. It is so much quicker and easier to do that there than having to write code, etc, here. Essentially, the only real change will be the location of the information. Of course, this will also affect the tumblr version of the Blog also. The page has been going for some time now, years in fact, and has long been a useful place for information concerning bushwalking and camping in Australia. Now it will the full range of environmental, wilderness, and all other manner of associated articles and news, as well as the bushwalking and camping emphasis.
If you would like to continue the journey with me, please visit the Facebook Page linked to below – and thank you for visiting me here over the years.
This knowledge gap was reflected in the latest report from the Intergovernmental Panel on Climate Change (IPCC). It contains projections from models in which important processes affecting the ice sheets, known as feedbacks and tipping points, are absent because scientific understanding is lacking.
Projected sea level rise will have widespread effects in Australia and around the world. But current projections of ice sheet melt are so wide that developing ways for societies to adapt will be incredibly expensive and difficult.
If the world is to effectively adapt to sea level rise with minimal cost, we must quickly address the uncertainty surrounding Antarctica’s melting ice sheet. This requires significant investment in scientific capacity.
The great unknown
Ice loss from the Antarctic and Greenland ice sheets was the largest contributor to sea level rise in recent decades. Even if all greenhouse gas emissions ceased today, the heat already in the ocean and atmosphere would cause substantial ice loss and a corresponding rise in sea levels. But exactly how much, and how fast, remains unclear.
Scientific understanding of ice sheet processes, and of the variability of the forces that affect ice sheets, is incredibly limited. This is largely because much of the ice sheets are in very remote and harsh environments, and so difficult to access.
This lack of information is one of the main sources of uncertainty in the models used to estimate ice mass loss.
At the moment, quantifying how much the Greenland and Antarctic ice sheets will contribute to sea level rise primarily involves an international scientific collaboration known as the “Ice Sheet Model Intercomparison Project for CMIP6”, or ISMIP6, of which we are part.
The project includes experts in ice sheet and climate modelling and observations. It produces computer simulations of what might happen if the polar regions melt under different climate scenarios, to improve projections of sea level rise.
The project also investigates ice sheet–climate feedbacks. In other words, it looks at how processes in the oceans and atmosphere will affect the Antarctic and Greenland ice sheets, including whether the changes might cause them to collapse – leading to large and sudden increases in sea level.
Research has identified so-called “basal melt” as the most significant driver of Antarctic ice loss. Basal melt refers to the melting of ice shelves from underneath, and in the case of Antarctica, interactions with the ocean are thought to be the main cause. But gathering scientific observations beneath ice shelves is a major logistical challenge, leading to a dearth of data about this phenomenon.
This and other constraints mean the rate of progress in ice sheet modelling has been insufficient to date, and so active ice sheet models are not included in climate models.
Scientists must instead make projections using the ice sheet models in isolation. This hinders scientific attempts to accurately simulate the feedback between ice and climate.
For example, it creates much uncertainty in how the interaction between the ocean and the ice shelf will affect ice mass loss, and how the very cold, fresh meltwater will make its way back to global oceans and cause sea level rise, and potentially disrupt currents.
Despite the uncertainties ISMIP6 is dealing with, it has published a series of recent research including a key paper published in Nature in May. This found if the world met the Paris Agreement target of limiting global warming to 1.5℃ this century, land ice melt would cause global sea level rise of about 13cm by 2100, in the most optimistic scenario. This is compared to a rise of 25cm under the world’s current emissions-reduction pledges.
The study also outlines a pessimistic, but still plausible, basal melt scenario for Antarctica in which sea levels could be five times higher than in the main scenarios.
The below graph shows the IPCC’s latest sea level projections. The shaded area reflects the large uncertainties in models using the same basic data sets and approaches. The dotted line reflects deep uncertainty about tipping points and thresholds in ice sheet stability.
IPCC reports are intended to guide global policy-makers in coming years and decades. But the uncertainties about ice melt from Antarctica limit the usefulness of projections by the IPCC and others.
It’s crucial that ice sheet models are improved, tested robustly against real-world observations, then integrated into the next generation of international climate models – including those being developed in Australia.
International collaborations such as NECKLACE and RISE are seeking to coordinate international effort between models and observations. Significant investment across these projects is needed.
Sea levels will continue rising in the coming decades and centuries. Ice sheet projections must be narrowed down to ensure current and future generations can adapt safely and efficiently.
The authors would like to acknowledge the contributions of Dr Ben Galton-Fenzi, Dr Rupert Gladstone, Dr Thomas Zwinger and David Reilly to the research from which this article draws.
Lithium is a crucial component of energy storage, both for renewable energy technologies and electric vehicles. Forecast demand has prompted efforts by companies and governments worldwide to tap into this market – a scramble dubbed the “white gold rush”.
As lithium projects have multiplied across Australia, Europe, Latin America and the US in recent years, so too have concerns over their environmental and social impacts. Communities near proposed and existing lithium mines are some of the loudest opponents. In a town near the proposed mine in Serbia, a banner reads: “No mine, yes life”.
Lithium extraction serves legitimate global environmental needs. But the industry must not ignore local social and environmental risks, and community voices must be included in decision making. The harsh lessons of mining to date need not be learned again in new places.
Weighing the risks
According to the latest estimates, the world’s resources of lithium sit at 86 million tonnes, a number that continues to grow as new deposits are found every year. Australia is the main producer of lithium, where it’s mined from hard rock called “spodumene”. The largest deposits are found in South America, where lithium is extracted from brines underneath salt flats.
In many cases, lithium mines are relatively new operations, yet complex and adverse social and environmental impacts have already been observed. More research and better targeted policy are needed to help understand and manage the socio-environmental impacts.
The Jadar lithium project is operated by Rio Sava, a subsidiary of Rio Tinto. It’s expected to become one of Serbia’s largest mines, occupying around 387 hectares, and contribute to at least 1% of Serbia’s GDP.
An environmental impact study commissioned by Rio Tinto, and obtained by Reuters, found the project would cause “irredeemable damage” to the environment, concluding the project should not go ahead. Environmental impacts are expected for any mine proposal. Yet some are manageable, so such a grave assessment in this case is not encouraging.
The extent to which a project shows best practice in mine management can depend on pressure from communities, investors and governments. Promises to adhere to all regulations are a common response from the industry.
But as we’re seeing in Chile, significant environmental damage and socio-environmental impacts can still occur within established regulations. Here, communities living on the salt flats are concerned about the effect of removing groundwater for lithium extraction on their livelihoods and surrounding ecosystems.
The communities fear the potential risks of air and waterborne pollution from the lithium mine, destruction of biodiversity, and the loss of land to mine infrastructure. These risks could affect the livelihoods of local landholders, farmers and residents.
Of particular concern is that the proposed locations for mine waste (tailings) are in a valley prone to flash flooding and may lead to toxic waste spills. This previously occurred in the same region when the abandoned Stolice antimony mine flooded in 2014. Rio Tinto has said it will try to mitigate this risk by converting the liquid waste into so-called “dry cakes”.
In response to this article, a Rio Tinto spokesperson said it has been working through the project requirements for 20 years, with a team of over 100 domestic experts studying the possible cumulative impacts in accordance with Serbian law, adding:
The study will consider all potential environmental effects of proposed actions and define measures to eliminate or reduce them […] including water, noise, air quality, biodiversity and cultural heritage.
Can we decarbonise without sacrifice?
The Jadar Mine project is touted for its potential to bring significant profits to both Rio Tinto and the Serbian state, while helping usher in the era of decarbonisation.
Rio Tinto plans to begin construction by 2022, “subject to receiving all relevant approvals, permits and licences and ongoing engagement”, with first saleable production expected in 2026.
But relatively fast timelines like this can sometimes be a sign of regulatory governance instability, including weak regulatory frameworks or regulatory capture (when agencies are increasingly dominated by the interests they regulate). We have seen this in Guyana, Peru and Brazil.
In Australia, Rio Tinto’s recent destruction of the culturally invaluable Juukan Gorge — which, notably, occurred legally — also demonstrates regulatory governance risks.
Rio Tinto’s spokesperson said its Environmental Impact Assessment process includes a public consultation period including, for example, meetings with non-government organisations, adding:
We have established information centres in Loznica and Brezjak and, since 2019, have hosted over 20 public open day events in these centres focusing on aspects of the project including environment studies, cultural heritage and land acquisition.
Although the Serbian government indicated that it’s prepared to hold a referendum to find out the will of citizens about the Jadar mine project, the community protests suggest the project hasn’t obtained any social license to operate.
A “social license to operate” is, despite its corporatised name, increasingly key to sustainable or responsible mining projects. It centres on ongoing acceptance by stakeholders, the public, and local communities of a company’s standard business practices. Building such trust takes time, and a social license is only a minimum requirement.
These processes cannot be rushed to ensure voices are heard, rights are respected, and environmental protection is possible.
A new frontier
Like many other communities negotiating proposed mine projects, local communities and residents in Serbia should not become another zone of sacrifice, shouldering the socio-environmental costs of supporting a renewable energy transition.
Lithium deposits are often seen as “new frontiers” in the places they’re discovered. Yet we must learn from historical lessons of frontier expansion, and remember that places imagined as “undiscovered” aren’t actually empty.
The people who live there must not bear the brunt of a so-called “green” future.
With the industry set to double in size by 2030, one dubious industry practice should be intensely scrutinised – the use of so-called “cracker bombs” or seal bombs.
The A$1 billion industry uses the technique to deter seals and protect fish farming operations. Cracker bombs are underwater explosive devices that emit sharp, extremely loud noise impulses. Combined, Tasmania’s three major salmon farm operators have detonated at least 77,000 crackers since 2018.
The industry says the deterrent is necessary, but international research shows the devices pose a significant threat to some marine life. Unless the salmon industry is more strictly controlled, native species will likely be killed or injured as the industry expands.
Protecting a lucrative industry
Marine farming has been growing rapidly in Tasmania since the 1990s, and Atlantic salmon is Tasmania’s most lucrative fishery‑related industry. The salmon industry comprises three major producers: Huon Aquaculture, Tassal and Petuna.
These companies go to great effort to protect their operations from fur seals, which are protected in Australia with an exemption for the salmon industry.
Seals may attack fish pens in search of food and injure salmon farm divers, though known incidents of harm to divers are extremely rare.
The industry uses a number of seal deterrent devices, the use of which is approved by the government. They include:
lead-filled projectiles known as “beanbags”, which are fired from a gun
sedation darts fired from a gun
explosive charges or “crackers” thrown into the water which detonate under the surface.
In June this year, the ABC reported on government documents showing the three major salmon producers had detonated more than 77,000 crackers since 2018. The documents showed how various seal deterrent methods had led to maiming, death and seal injuries resulting in euthanasia. Blunt-force trauma was a factor in half the reported seal deaths.
A response to this article by the salmon industry can be found below. The industry has previoulsy defended the use of cracker bombs, saying it has a responsibility to protect workers. It says the increased use of seal-proof infrastructure means the use of seal deterrents is declining. If this is true, it’s not yet strongly reflected in the data.
Given the prevalence of seal bomb use by the salmon industry, it’s worth reviewing the evidence on how they affect seals and other marine life.
A study on the use of the devices in California showed they can cause horrific injuries to seals. The damage includes trauma to bones, soft tissue burns and prolapsed eye balls, as well as death.
And research suggests damage to marine life extends far beyond seals. For example, the devices can disturb porpoises which rely on echolocation to find food, avoid predators and navigate the ocean. Porpoises emit clicks and squeaks – sound which travels through the water and bounces off objects. In 2018, a study found seal bombs could disturb harbour porpoises in California at least 64 kilometres from the detonation site.
There is also a body of research showing how similar types of industrial noise affect marine life. A study in South Africa in 2017 showed how during seismic surveys in search of oil or gas, which produce intense ocean noise, penguins raising chicks often avoided their preferred foraging areas. Whales and fish have also shown similar avoidance behaviour.
The study showed underwater blasts can also kill and injure seabirds such as penguins. And there may be implications from leaving penguin nests unattended and vulnerable to predators, and leaving chicks hungry longer.
Research also shows underwater explosions damage to fish. One study on caged fish reported profound trauma to their ears, including blistering, holes and other damage. Another study cited official reports of dead fish in the vicinity of seal bomb explosions.
Clearly, more scientific research is needed into how seal bombs affect marine life in the oceans off Tasmania. And regulators should impose far stricter limits on the salmon industry’s use of seal bombs – a call echoed by Tasmania’s Salmon Reform Alliance.
All this is unfolding as federal environment laws fail to protect Australian plant and animal species, including marine wildlife.
And the laws in Tasmania are far from perfect. In 2017, Tasmania’s Finfish Farming Environmental Regulation Act introduced opportunities for better oversight of commercial fisheries. However, as the Environmental Defenders Office (EDO) has noted, the director of Tasmania’s Environment Protection Authority can decide on license applications by salmon farms without the development necessarily undergoing a full environmental assessment.
Tasmania’s Marine Farming Planning Act covers salmon farm locations and leases. As the EDO has noted, the public is not notified of some key decisions under the law and has very limited public rights of appeal.
The Tasmanian government has thrown its support behind rapid expansion of the salmon industry. But it’s essential that the industry is more tightly regulated, and far more accountable for any environmental damage it creates.
In a statement in response to this article, the Tasmanian Salmonid Growers Association, which represents the three producers named above, said:
Around $500 million has been spent on innovative pens by the industry. These pens are designed to minimise risks to wildlife as well as to fish stocks and the employees. We believe that farms should be designed to minimise the threat of seals, but we also understand that non-lethal deterrents are a part of the measures approved by the government for the individual member companies to use. If these deterrents are used it is under strict guidelines, sparingly, and in emergency situations when staff are threatened by these animals, which can be very aggressive.
Tasmania has a strong, highly regulated, longstanding salmon industry of which we should all be proud. The salmon industry will continue its track record of operating at world’s best practice now and into future. Our local people have been working in regional communities for more than 30 years, to bring healthy, nutritious salmon to Australian dinner plates, through innovation and determination.
They may be relatively small, but these patches and strips conserve critical remnant habitat and have disproportionate conservation value worldwide. They represent the last vestiges of once-expansive tracts of woodland and forests, long lost to the chainsaw or plough.
And yet, the NSW government last week made it legal for rural landholders to clear vegetation on their properties, up to 25 metres from their property boundaries, without approval. This radical measure is proposed to protect people and properties from fires, despite the lack of such an explicit recommendation from federal and state-based inquiries into the devastating 2019-20 bushfires.
This is poor environmental policy that lacks apparent consideration or justification of its potentially substantial ecological costs. It also gravely undermines the NSW government’s recent announcement of a plan for “zero extinction” within the state’s national parks, as the success of protected reserves for conservation is greatly enhanced by connection with surrounding “off-reserve” habitat.
Small breaks in habitat can have big impacts
A 25m firebreak might sound innocuous, but when multiplied by the length of property boundaries in NSW, the scale of potential clearing and impacts is alarming, and could run into the hundreds of thousands of kilometres.
Some plants, animals and fungi live in these strips of vegetation permanently. Others use them to travel between larger habitat patches. And for migratory species, the vegetation provides crucial refuelling stops on long distance journeys.
For example, the roadside area in Victoria’s Strathbogie Ranges shown below is home to nine species of tree-dwelling native mammals: two species of brushtail possums, three species of gliders (including threatened greater gliders), common ringtail possums, koalas, brush-tailed phascogales, and agile antenchinus (small marsupials).
This is because firebreaks of 25m (or 50m where neighbouring landholders both clear) could prevent the movement and dispersal of many plant and animal species, including critical pollinators such as native bees.
An entire suite of woodland birds, including the critically endangered regent honeyeater, are threatened because they depend on thin strips of vegetation communities that often occur inside fence-lines on private land.
For instance, scientific monitoring has shown five pairs of regent honeyeaters (50% of all birds located so far this season) are nesting or foraging within 25m of a single fence-line in the upper Hunter Valley. This highlights just how big an impact the loss of one small, private location could have on a species already on the brink of extinction.
But it’s not just regent honeyeaters. The management plan for the vulnerable glossy black cockatoo makes specific recommendation that vegetation corridors be maintained, as they’re essential for the cockatoos to travel between suitable large patches.
Native bee conservation also relies on the protection of remnant habitat adjoining fields. Continued removal of habitat on private land will hinder chances of conserving these species.
Disastrous clearing laws
The new clearing code does have some regulations in place, albeit meagre. For example, on the Rural Fire Service website, it says the code allows “clearing only in identified areas, such as areas which are zoned as Rural, and which are considered bush fire prone”. And according to the RFS boundary clearing tool landowners aren’t allowed to clear vegetation near watercourses (riparian vegetation).
Even before introducing this new code, NSW’s clearing laws were an environmental disaster. In 2019, The NSW Audit Office found:
clearing of native vegetation on rural land is not effectively regulated [and] action is rarely taken against landholders who unlawfully clear native vegetation.
The data back this up. In 2019, over 54,500 hectares were cleared in NSW. Of this, 74% was “unexplained”, which means the clearing was either lawful (but didn’t require state government approval), unlawful or not fully compliant with approvals.
Landholders need to show they’ve complied with clearing laws only after they’ve already cleared the land. But this is too late for wildlife, including plant species, many of which are threatened.
Landholders follow self-assessable codes, but problems with these policies have been identified time and time again — they cumulatively allow a huge amount of clearing, and compliance and enforcement are ineffective.
We also know, thanks to various case studies, the policy of “offsetting” environmental damage by improving biodiversity elsewhere doesn’t work.
Nobody disputes the need to keep people and their assets safe against the risks of fire. The code should be amended to ensure clearing is only permitted where a genuinely clear and measurable fire risk reduction is demonstrated.
Granting permission to clear considerable amounts of native vegetation, hundreds if not thousands of metres away from homes and key infrastructure in large properties is hard to reconcile, and it seems that no attempt has been made to properly justify this legislation.
We should expect that a comprehensive assessment of the likely impacts of a significant change like this would inform public debate prior to decisions being made. But to our knowledge, no one has analysed, or at least revealed, how much land this rule change will affect, nor exactly what vegetation types and wildlife will likely be most affected.
A potentially devastating environmental precedent is being set, if other regions of Australia were to follow suit. The environment and Australians deserve better.
James Ha, Grattan InstitutePolitical momentum is growing in Australia to cut greenhouse gas emissions to net-zero by 2050. On Friday, Treasurer Josh Frydenberg was the latest member of the federal government to throw his weight behind the goal, and over the weekend, Prime Minister Scott Morrison acknowledged “the world is transitioning to a new energy economy”.
But for Australia to achieve net-zero across the economy, emissions from agriculture must fall dramatically. Agriculture contributed about 15% to Australia’s greenhouse gas emissions in 2019 – most of it from cattle and sheep. If herd numbers recover from the recent drought, the sector’s emissions are projected to rise.
Cutting agriculture emissions will not be easy. The difficulties have reportedly triggered concern in the Nationals’ about the cost of the transition for farmers, including calls for agriculture to be carved out of any net-zero target.
But as our new Grattan Institute report today makes clear, agriculture must not be granted this exemption. Instead, the federal government should do more to encourage farmers to adopt low-emissions technologies and practices – some of which can be deployed now.
Many farmers want to be part of the climate solution – and must be – for three main reasons.
First, the agriculture sector is uniquely vulnerable to a changing climate. Already, changes in rainfall have cut profits across the sector by 23% compared to what could have been achieved in pre-2000 conditions. The effect is even worse for cropping farmers.
Livestock farmers face risks, too. If global warming reaches 3℃, livestock in northern Australia are expected to suffer heat stress almost daily.
Second, parts of the sector are highly exposed to international markets – for example, about three-quarters of Australia’s red meat is exported.
There are fears Australian producers may face a border tax in some markets if they don’t cut emissions.
The European Union, for instance, plans to introduce tariffs as early as 2023 on some products from countries without effective carbon pricing, though agriculture will not be included initially.
Third, the industry recognises action on climate change can often boost farm productivity, or help farmers secure resilient revenue streams. For example, trees provide shade for animals, while good soil management can preserve the land’s fertility. Both activities can store carbon and may generate carbon credits.
Carbon credits can be used to offset farm emissions, or sold to other emitters. In a net-zero future, farmers can maximise their carbon credit revenue by minimising their own emissions, leaving them more carbon credits to sell.
The agriculture sector itself is increasingly embracing the net-zero goal. The National Farmers Federation supports an economy-wide aspiration to be net-zero by 2050, with some conditions. The red meat and pork industries have gone further, committing to be carbon neutral by 2030 and 2025 respectively.
The sector’s non-animal emissions largely came from burning diesel, the use of fertiliser, and the breakdown of leftover plant material from cropping.
Unlike in, say, the electricity sector, it’s not possible to completely eliminate agricultural emissions, and deep emissions cuts look difficult in the near term. That’s because methane produced in the stomachs of cattle and sheep represents more than 60% of agricultural emissions; these cannot be captured, or eliminated through renewable energy technology.
Supplements added to stock feed – which reduce the amount of methane the animal produces – are the most promising options to reduce agricultural emissions. These supplements include red algae and the chemical 3-nitrooxypropanol, both of which may cut methane by up to 90% if used consistently at the right dose.
But it’s difficult to distribute these feed supplements to Australian grazing cattle and sheep every day. At any given time, only about 4% of Australia’s cattle are in feedlots where their diet can be easily controlled.
Diesel use can be reduced by electrifying farm machinery, but electric models are not yet widely available or affordable for all purposes.
These challenges slow the realistic rate at which the sector can cut emissions. Yet there are things that can be done today.
Many manure emissions can be avoided through smarter management. For example, on intensive livestock farms, manure is often stored in ponds where it releases methane. This methane can be captured and burnt, emitting the weaker greenhouse gas, carbon dioxide, instead.
And better targeted fertiliser use is a clear win-win – it would save farmers money and reduce emissions of nitrous oxide, a potent greenhouse gas.
Governments must walk and chew gum
An economy-wide carbon price would be the best way for Australia to reduce emissions in an economically efficient manner. But the political reality is that carbon pricing is out of reach, at least for now. So Australia should pursue sector-specific policies – including in agriculture.
Governments must walk and chew gum. That means introducing policies to support emissions-reducing actions that farmers can take today, while investing alongside the industry in potential high-impact solutions for the longer term.
Accelerating near-term action will require improving the federal government’s Emissions Reduction Fund, to help more farmers generate Australian carbon credit units. It will also require more investment in outreach programs to give farmers the knowledge they need to reduce emissions.
Improving the long-term emissions outlook for the agriculture sector requires investment in high-impact research, development and deployment. Bringing down the cost of new technologies is possible with deployment at scale: all governments should consider what combination of subsidies, penalties and regulations will best drive this.
Agriculture must not become the missing piece in Australia’s net-zero puzzle. Without action today, the sector may become Australia’s largest source of emissions in coming decades. This would require hugely expensive carbon offsetting – paid for by taxpayers, consumers and farmers themselves.
Matt McDonald, The University of QueenslandPrime Minister Scott Morrison is reportedly developing a plan for Australia to adopt a target of net-zero emissions by 2050. Climate change was a central focus of the Quad talks in Washington which Morrison attended in recent days, and he is under significant international pressure to adopt a net-zero target ahead of climate talks in Glasgow in November.
Morrison is very late to the party on issue of net-zero – and lagging far behind public opinion. A recent Lowy poll showed 78% of Australians support the target.
But standing firmly in Morrison’s way is the Coalition’s junior partner, the Nationals. The words of key Nationals figures including Resources Minister Keith Pitt and pro-coal senator Matt Canavan suggest net-zero is the hill they will die on. And Nationals leader Barnaby Joyce, not exactly a climate warrior, has indicated he’s yet to be convinced on the merits of the target.
Ultimately though, this is just bad strategy from the Nationals. It burns valuable political capital for no good reason, and abrogates responsibility to their own constituents.
Not much of a target at all
First, a net-zero emissions target is a really obvious position of compromise for the Nationals specifically, and for a reluctant Australian government more generally.
Getting to net-zero by 2050 also doesn’t necessarily require immediate or significant emissions cuts. As critics including Greta Thunberg and former IPCC chair Bob Watson have argued, the targets can create the impression of action without requiring immediate change.
Research shows many jurisdictions with a net-zero target do not have robust measures in place to ensure they’re met, such as interim targets and a reporting mechanism.
And the timeframe for net-zero – whether 2050 like most nations, or 2060 as per China – is way beyond the political longevity of our current government MPs. That means those now in parliament will be spared much of the political pain of implementing policies required to meet the target.
Finally, pursuing net-zero emissions (rather than just zero-emissions in sectors where that is feasible) allows fossil fuel companies to offset their climate damage, by buying carbon credits, rather than stopping their polluting activity. It also potentially allows for fairly speculative efforts to remove greenhouse gases from the atmosphere via geoengineering.
For these reasons and more, the net-zero goal is in often criticised as a dangerous trap for doing very little on climate change – which appears to be the goal of many in the Nationals.
In opposing the net-zero target, the Nationals often point to potential damage to the nation’s mining and farming sectors, primarily a loss of jobs and economic growth. Some Nationals have called for those sectors to be carved out of any net-zero target.
On the question of agriculture, research released by the Grattan Institute this week shows it’s getting increasingly hard to argue the sector should be exempt from the target – its emissions are simply too great.
And there is much that can be done right now to cut agriculture emissions, if the government does more to encourage farmers to adopt the right technologies and practices.
On mining, the Nationals are fighting a losing battle. Soon, the world will no longer want our coal. As others have noted, we must prepare for the change and diversify the economy, rather than lamenting what’s still left in the ground. And Australia can easily replace coal-fired electricity generation with renewable energy, backed by storage.
By refusing to compromise on a net-zero target, the Nationals are burning all sorts of political capital they could potentially wield with the Liberals on a range of issues. The Nationals would have held particular sway over Liberals concerned about holding on to their inner city seats in a 2022 election.
More importantly, the position of Keith Pitt, Matt Canavan and other intransigents in the Nationals isn’t just an abandonment of future generations. Nor is it only a rejection of our responsibilities to vulnerable people in all parts of Australia and the world, or our duty of care to other living beings.
It’s also a spectacular betrayal of their own constituencies. Rural Australia will be disproportionately affected by climate change, particularly in the form of higher temperatures, changing rainfall patterns and increasing disasters like drought and bushfires. And the long-term economic costs of inaction for rural constituencies will be potentially catastrophic.
It’s for these reasons that organisations like the National Farmers Federation have specifically called for a commitment to net zero emissions.
In the 2019 election, the Nationals received just 4.5% of the vote in the lower house, with the Liberal Nationals of Queensland achieving just 8.7% (as a proportion of the national total). In both cases, it was less still in the Senate.
Yet despite speaking on behalf of a small fraction of the country, the party is holding Australian climate policy to ransom.
Maybe we can’t get the intransigents in the National Party to suddenly recognise their obligations to the planet and its inhabitants. But surely they can be convinced to represent the interests of rural voters? Time – what little we have left – will tell.
How will our ecosystems cope with this combination of threats? In our recently published paper, we looked to answer this exact question — and the news isn’t good.
We found while many plants are really good at withstanding certain types of fire, the combination of drought, heatwaves and pest insects may push many fire-adapted plants to the brink in the future. The devastating Black Summer fires gave us a taste of this future.
What happens when fires become more frequent?
Ash forests are one of the most iconic in Australia, home to some of the tallest flowering plants on Earth. When severe fire occurs in these forests, the mature trees are killed and the forest regenerates entirely from the seed that falls from the dead canopy.
These regrowing trees, however, do not produce seed reliably until they’re 15 years old. This means if fire occurs again during this period, the trees will not regenerate, and the ash forest will collapse.
This would have serious consequences for the carbon stored in these trees, and the habitat these forests provide for animals.
Southeast Australia has experienced multiple fires since 2003, which means there’s a large area of regrowing ash forests across the landscape, especially in Victoria.
The Black Summer bushfires burned parts of these young forests, and nearly 10,000 football fields of ash forest was at risk of collapse. Thankfully, approximately half of this area was recovered through an artificial seeding program.
What happens when fire seasons get longer?
Longer fire seasons means there’s a greater chance species will burn at a time of year that’s outside the historical norm. This can have devastating consequences for plant populations.
For example, out-of-season fires, such as in winter, can delay maturation of the Woronora beard-heath compared to summer fires, because of their seasonal requirements for releasing and germinating seeds. This means the species needs longer fire-free intervals when fires occur out of season.
The iconic gymea lily, a post-fire flowering species, is another plant under similar threat. New research showed when fires occur outside summer, the gymea lily didn’t flower as much and changed its seed chemistry.
While this resprouting species might persist in the short term, consistent out-of-season fires could have long-term impacts by reducing its reproduction and, therefore, population size.
When drought and heatwaves get more severe
In the lead up to the Black Summer fires, eastern Australia experienced the hottest and driest year on record. The drought and associated heatwaves triggered widespread canopy die-off.
Extremes of drought and heat can directly kill plants. And this increase in dead vegetation may increase the intensity of fires.
Another problem is that by coping with drought and heat stress, plants may deplete their stored energy reserves, which are vital for resprouting new leaves following fire. Depletion of energy reserves may result in a phenomenon called “resprouting exhaustion syndrome”, where fire-adapted plants no longer have the reserves to regenerate new leaves after fire.
Therefore, fire can deliver the final blow to resprouting plants already suffering from drought and heat stress.
Drought and heatwaves could also be a big problem for seeds. Many species rely on fire-triggered seed germination to survive following fire, such as many species of wattles, banksias and some eucalypts.
But drought and heat stress may reduce the number of seeds that get released, because they limit flowering and seed development in the lead up to bushfires, or trigger plants to release seeds prematurely.
For example, in Australian fire-prone ecosystems, temperatures between 40℃ and 100℃ are required to break the dormancy of seeds stored in soil and trigger germination. But during heatwaves, soil temperatures can be high enough to break these temperature thresholds. This means seeds could be released before the fire, and they won’t be available to germinate after the fire hits.
Heatwaves can also reduce the quality of seeds by deforming their DNA. This could reduce the success of seed germination after fire.
What about insects? The growth of new foliage following fire or drought is tasty to insects. If pest insect outbreaks occur after fire, they may remove all the leaves of recovering plants. This additional stress may push plants over their limit, resulting in their death.
This phenomenon has more typically been obverved in eucalypts following drought, where repeated defoliation (leaf loss) by pest insects triggered dieback in recovering trees.
When threats pile up
We expect many vegetation communities will remain resilient in the short-term, including most eucalpyt species.
But even in these resilient forests, we expect to see some changes in the types of species present in certain areas and changes to the structure of vegetation (such as the size of trees).
As climate change progresses, many fire-prone ecosystems will be pushed beyond their historical limits. Our new research is only the beginning — how plants will respond is still highly uncertain, and more research is needed to untangle the interacting effects of fire, drought, heatwaves and pest insects.
We need to rapidly reduce carbon emissions before testing the limits of our ecosystems to recover from fire.
Michelle Grattan, University of CanberraA tough debate is expected when a highly volatile Nationals parliamentary party meets on Monday, ahead of climate change negotiations between Prime Minister Scott Morrison and Nationals leader Barnaby Joyce to endorse a target of net zero emissions by 2050.
Joyce is under dual pressure, with his party room sharply divided over the 2050 target, and former minister Darren Chester announcing, in a weekend statement which criticised Joyce without naming him, that he is taking “some time away” from the party room.
No details of the climate plan are yet on the table, but strong positioning is underway, with negotiations between Morrison and Joyce resuming once the PM, returning on Sunday night from his American trip, is back in the country.
The Nationals meet every fortnight, remotely when parliament is not sitting.
Joyce indicated on Friday he would accept the government adopting a firm target of net zero emissions by 2050 provided the regions were not worse off. He also wants some largesse for the Nationals.
At the same time he is expressing concerns and gives the impression of being dragged reluctantly towards an agreement.
Morrison was pressed again while in the US about increasing Australia’s ambition on climate policy and has signalled he proposes to do so. But he has to get the minor Coalition partner on side.
Both President Joe Biden and British Prime Minister Boris Johnson have pushed Australia hard as the November Glasgow climate conference draws near.
The government’s current position is net zero “preferably” by 2050.
Interviewed by the ABC on Sunday, Joyce provided little fresh clarity. But asked whether there should be no coal jobs lost, he said, “well, not by reason of domestic policy”.
Deputy Nationals leader and agriculture minister David Littleproud, who supports the 2050 firm target with safeguards and incentives for the regions, told Sky that members of the Nationals party room were “pragmatic”. They were “looking through the lens of protecting regional Australia but making sure there’s opportunity for regional Australia to also participate in this”.
But former resources minister Matt Canavan tweeted, “I am deadset against net zero emissions. Just look at the disaster the UK is living through. They’re switching off their industry to keep their lights on, and they are struggling to feed themselves. Net zero emissions would just make us weaker.”
Resources minister Keith Pitt said: “We are yet to see the strategy, the plan, the cost, and who’s paying.
“My priority will be the 1.2 million direct and indirect jobs associated with the resources sector”.
Chester, who is a supporter of net zero, won’t be in the meeting to help advance the case. He said he had “decided to take a break from organised meetings, events and activities in The Nationals Federal Parliamentary party room.
“I will reassess my position when Federal Parliament resumes in October.
“To be clear, I continue to support the Coalition government but want some time away from the The Nationals Federal Parliamentary party room to reflect on a number of significant issues.
“My decision follows months of frustration with the repeated failure of the leadership to even attempt to moderate some of the more disrespectful and offensive views expressed by a minority of colleagues.”
Chester, who was dropped from the frontbench when Joyce became leader, has been highly critical of Queensland National George Christensen, whose string of provocative comments have included, most recently, accusing Victorian police of using excessive force against demonstrators, and suggesting they should be arrested.
Joyce on Sunday again indicated he could not silence Christensen, who is retiring at the election, and said that anyway, there was a right of free speech.
Asked on SBS whether he thought he had the support of the majority of the Nationals to go forward on climate policy, Morrison said: “It’s not about my view. It’s about what I think Australians are clearly looking for”.
“My job is to bring my government together to focus on the plan that can achieve it.
“A plan [that] says to Australians, whether they’re up in the Hunter, or down in Bell Bay, or up in Gladstone or up in the Pilbara […] this is how we achieve net zero emissions in the future.
“Our view is that we can achieve that by keeping the costs low, keeping people in industries, ensuring we’re using transition fuels that take us from one place to the next, and we take people on the journey,” Morrison said.
The communique from the QUAD summit which Morrison attended at the end of his trip said: “We have joined forces to tackle the climate crisis, which must be addressed with the urgency it demands.
“Quad countries will work together to keep the Paris-aligned temperature limits within reach and will pursue efforts to limit it to 1.5°C above pre-industrial levels.
“To this end, Quad countries intend to update or communicate ambitious NDCs [nationally determined contributions] by COP26 and welcome those who have already done so.”
The QUAD includes the US, Australia, Japan and India.
Richard Holden, UNSWWorld leaders and about 30,000 others from assorted interest groups will converge on Glasgow in November for the United Nations’ 26th annual climate summit, COP26 (“Conference of the Parties”).
It will be five years (allowing for a one-year Tokyo 2020-style pandemic hiatus) since the Paris Agreement adopted at COP21 in 2015.
There has been plenty of cynicism about that agreement, its structure and non-binding nature. Important emitters like China were effectively exempt from making meaningful carbon-reduction commitments.
Some OECD countries (such as Canada) have paid lip service to the agreement but done little. Still others (such as Australia) have made some progress reducing emissions but have no long-term plan, relying instead on bumper-sticker slogans about “technology not taxes” and, until recently, hiding behind dodgy accounting tricks.
That aside, it’s hard to see how the world solves what amounts to — as economists put it — a “coordination problem” without global agreements.
For roughly half a century economists have been unanimous about what those agreements must involve — a price on carbon. The 2018 economics Nobel prize awarded to William Nordhaus was belated recognition of this fact.
A price on carbon — in the form of a carbon tax or emissions trading scheme — is a way to use the power of the market’s price mechanism to balance the good that comes from emitting carbon (economic development) with the bad (climate change).
Set the price of carbon at the true social cost of carbon (taking into account all the ills that come from climate change) and the invisible hand of the market will balance the pros and cons. Think of it as Friedrich von Hayek meets Greta Thunberg.
But there is another, less dramatic way to harness market forces to reduce carbon emissions: disclosure.
The idea starts with this: plenty of consumers want to reduce their carbon footprint and are willing to pay for it. That’s why people recycle, use green energy even when it’s more expensive, buy low-carbon clothing, and drive electric cars. A bunch of folks are willing to pay to be green.
The success of companies such as eco-friendly sneaker company Allbirds and electic vehicle maker Tesla exist is evidence of the market catering to these consumer preferences. But can we make it easier for consumers to express their environmental preferences? Can we turbocharge the market for greener products?
Authored by Carnegie Mellon University economists Lavender Yang, Nicholas Muller and Pierre Jinghong Liang, the paper looks at the US Environmental Protectino Agency’s Greenhouse Gas Reporting Program. In effect from 2010, this has required big carbon emitters (including all power plants that produce more than 25,000 tonnes of carbon dioxide a year) to publicly disclose how much they emit.
The authors look at the effect of this disclosure program on the electric power industry, which accounts for 27% of all US emissions.
The results are striking. Plants subject to greater scrutiny reduced their carbon emissions by 7%. Plants owned by publicly listed companies reduced their emissions by 10%. Large public companies, such as those in the S&P500 stock index, cut emissions even more (11%).
The reason appears to be responsiveness to investors wanting companies to be more environmentally responsible. This explains why emissions went down more for public companies, and even more for large public companies, whose shares are more likely to be held by funds with an ESG (Environment, Social and Governance) mandate.
Some of these investors have pro-social preferences and want to invest their money in more sustainable companies. Others might not care about the environment per se, but know that lots of folks do. Businesses that cater to these consumer preferences have an advantage.
The dark side to this is that the decline in emissions by major plants was partially offset by an increase in emissions by plants under the 25,000-tonne threshold not subject to disclosure.
In other words, companies responded to the incentives provided by disclosure requirements. Those who could “hide” their emissions did not.
The lesson is that disclosure requirements work. They force companies to own up to their customers and investors, and face the reality of their emissions behaviour. But we need to apply it to all companies, not just big ones.
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