Tue, 02 Mar 2021

Scott Morrison must find a way to make net-zero targets viable

Independent Australia
14 Feb 2021, 07:52 GMT+10

After seemingly changing his stance on a 2050 net-zero emissions target, it's now up to Scott Morrison to actually do something about it, writes Stephen Saunders.

HERE'S U.S. PRESIDENT Joe Biden to "save" global climate. Now China's committed to U.N. net-zero. But net-zero can't transform Australia's economy or fix its environment. And don't even countenance any "net-zero" mediated by Prime Minister Scott Morrison from marketing.

The United Nations desideratum of net-zero emissions is a newbie, as compared with related concepts of emissions trading or carbon neutrality.

So it's been claimed, the concept crystallised at a 2013 activists' retreat featuring then United Nations Framework Convention on Climate Change (UNFCCC) supremo Christiana Figueres.

The UNFCCC Paris Agreement came into force in 2016 to 'achieve a balance between anthropogenic emissions by sources, and removals by sinks of greenhouse gases, in the second half of this century'.

The 2018 UN IPCC report pushed further. Humans had already warmed the world 0.8-1.2C. To hold the line at 1.5C, net-zero would have to be achieved by 2050 in 'developed economies', globally as 'soon as possible' thereafter.

Rising world emissions - neutralised. Rising atmospheric CO2 and land-ocean temperatures - arrested. Who wouldn't buy that? But is it too good to be true?

Morrison Government still stalling on emissions targets

Prime Minister Scott Morrison is still refusing to adhere to any clear policies regarding net zero emissions targets.

Enthusiastic NSW Liberal Matt Kean scoffed at Morrison's tardiness in "committing". Australia, nevertheless, should check and double-check the U.N. vehicle.

Its first drive is emissions reductions. Humans must steeply decarbonise electric power, electrify (or otherwise transform) industry and transport. Topping humans' Land Use, Land-Use Change and Forestry (LULUCF) changes, these fossil-fuel intensive sectors account for most of human emissions.

There's scientific to and fro as to whether you can approach 100% renewable energy via "pure" wind, water and solar. There are quandaries of networks, transmission, storage, demand peaks and grid fluctuations. Meanwhile, industry and transport are much harder to decarbonise.

The other drive is "negative emissions". Earth, atop its own carbon cycle, is groomed to "capture" excess human emissions. That's no cinch either.

Net-zero happens when these two drives cancel out. Year upon year, "residual" human emissions are offset by greenhouse gas (GHG) removals.

Net-zero imponderables

Humanity's gleeful war on the environment marches against its net-zero aspirations.

Nominally, human CO2 "greens" the planet (and Australia). Yet humans have directly disturbed half the land surface. Just over 2000-2013, intact landscapes the size of Mexico were modified. No surprise, the planet's Greenhouse Gas Index shoots up.

We've triggered the sixth wave of extinction, though business sells us expansive growth on the non-expansive planet. The U.N. environmental focus is the climate emergency. Playing down environmental degradation via human populations and overconsumption.

Similarly, Australian government and science have shuttered 1990s evaluations of the driest continent's carrying capacity. Now, Australian Academy of Science and CSIRO endorse Aussie net-zero.

This would somehow leapfrog pervasive logging and land clearing, habitat and species losses, water-guzzling, population growth and rising emissions. Somehow, we'd decide when to relinquish the fossil fuel booty.

Think about the 230-year environmental assault. Consider current State of the Environment reports and permissive frameworks for clearing habitat. As NSW Liberals and Nationals fine-tune koala slaughter, our rare bird species hoot at "recovery" plans. Mega fires barely dent unprofitable overcutting of native forests.

Barnaby Joyce shows why the Coalition won't embrace climate action

For all the uncertainty cast by unprecedented global pandemics and unpredictable election results, some things never change.

For blasting Indigenous heritage, three mining chiefs skim $40 million in termination payments. With floodplain harvesting rampant, we accidentally on purpose "lose" a fifth of Murray-Darling water. Even around Sydney, coal-for-electricity vies with water and habitat. A Caymans company can cream $80 million for an Aussie water mirage.

To top it off, Morrison looks to garrotte an EPBC Act already calibrated to yield repeatedly to over-development. Among wealthier nations, Australia's more your green also-ran or climate laggard than a coming net-zero champ.

Crucially, if Australia and the world are that close to 1.5C warming, they're still that far from net-zero.

Over the 20th Century, global CO2 emissions grew three times faster than the population. Granted, that balance has shifted. Global CO2 emissions are up 90% since 1970 - less than population growth.

There are also non-CO2 GHG, especially methane and nitrous oxide. These outriders, messing with neat emissions projections and schemes, have also shot up.

Relative to the natural emissions cycle, human CO2 emissions are small. But lands and oceans mopped up only half of such emissions over 1959-2009, roughly 25% apiece. The planet's lifted its absorption game, but that may not continue.

Analogously, CSIRO estimated Australia reabsorbed just one-third of the CO2 emitted via our 1990-2010 fossil fuel usage.

The planet reads aggregate, not per capita, emissions. Despite decades of global climate policy, atmospheric CO2 chugs past 400 ppm. The planet keeps warming.

From here on, imply the enthusiasts, we'll really and truly collapse human emissions. We'll plant trees and technologically capture emissions to neutralise the "residues".

That's challenged by the implausibility that continuing economic growth can largely "decouple" from the severe pressures on the environment.

Finally, there's a technicality around net-zero. Maybe the "negative emissions" aren't fully fungible with "emissions reductions".

Measurement of anthropogenic emissions is imperfect. It's tricky, reliably translating non-CO2 gases into their CO2 "equivalents". Still, human emissions seem easier to gauge than unruly Earth's GHG feedback loops.

We don't fully understand how lands and seas sink carbon. Some landscapes perform better than others. Landscapes also emit GHG. Dramatically, Australia's 2019-20 forest fires unlocked more than its "official" annual emissions.

Landscapes and plants, especially tropical, may reabsorb less GHG than expected, while North and South Poles unveil heat and GHG surprises. Littoral landscapes might reabsorb GHG better than expected. That is if we weren't trashing them.

Morrison missing the memo on climate change

Australia must commit to a net-zero carbon emission target to avoid becoming an international pariah, writes Professor John Quiggin.

Land-sea carbon capture is "apples". Fossil fuel-based emissions are "oranges".

Apples are approximate, continually recalculated and less permanent. It's bold to assume they can neutralise oranges. That tends to defer strenuous "emissions reductions" in favour of emblematic "negative emissions".

I wonder if this computational net-zero could bind Earth to 1.5C hotter. Meantime, Australia and its fossil fuel lobby add barbecue flavours to world emissions policies.

Aussie emissions capers

Back at the 1997 Kyoto discussions, the Coalition finessed the so-called "Australia clause", allowing us big emissions "credits" via reduced land clearing.

Now, we're a global deforestation hotspot with significant land clearing continuing. Incoherently, Nationals suggest "excluding" agriculture from net-zero.

Our 2030 emissions reduction of 26-28% has leant on discredited Kyoto "credits". With or without them, 26-28% is unambitious for 2030 and little use for 2050.

Setting aside fluctuating LULUCF estimates, annual Australian emissions have risen from the 400s of megatonnes (Mt) in 1990 to the 500s today. Including them, data shows falling emissions.

At 2020, our official 2030 emissions projection fell to 478 Mt. Still substantial. And 2045 isn't looking hugely better.

But the population has grown 40% since 1990. Evidently, we've "decoupled" somewhat. It's still a slog to net-zero, if less so for Ross Garnaut.

In his 2008 review, Australia's rangelands and forests could reabsorb 500 Mt emissions a year. His claims run higher now. We'd sell surplus carbon "credits". Enticingly, we'd be an 'economic superpower of the future post-carbon world'.

Garnaut glosses the physical and logistical problems of nullifying fossil fuel-based emissions. Usefully, he argues that an energy transition is affordable, that we could manage the intermittency of renewable energy.

Growth remains his key agenda, continuing 'economic development... without sacrificing living standards'. Environment, rather than being externalised as such, becomes the get-out-of-gaol card.

Aussie net-zero perspectives

U.N. net-zero presumes bold technologies - to accelerate renewables and shrink other human emissions. It repurposes the struggling environment as a high-performance carbon-sink.

It assumes that sink can deliver with continual absorption of human emissions "residues". To ice the cake - Earth stops warming and green industry burgeons.

That's an interesting aspiration for Australia. Environmental science commonly makes way for environmental spin. By contrast, under COVID-19, Morrison gives health science a front seat. He and the apex species are directly threatened.

Australia needs to commit to target of net-zero emissions by 2050

After two decades of refusal to acknowledge the science of climate change, it has taken a national bushfire tragedy for policy-makers to wake-up.

His "quiet Australians" also want climate action or net-zero. So, by all means, let's cut emissions and make the energy transition, which could create jobs.

Yet cheap renewables alone can't revive our gutted manufacturing. Nor would Morrison's "cheap gas".

Instead, some recommend for Australia, the Green New Deal of the U.S. and EU. Like net-zero, this rather tiptoes around the war on the environment.

For a moment, let's accept that "negative emissions" and "emissions reductions" kindly restrict global warming to 1.5C around 2050.

Unless Australia unexpectedly shifts its cultural settings of growth-at-all-costs, that still wouldn't arrest our broad environmental decline. As we bulldoze their specialised green leaves, koalas can't switch to white leaves from our emissions budgets.

After Fukushima, Germany shunned nuclear. Japan, too, went long on coal. Now Japan's advertising net-zero. So is China, by 2060. Whereupon Australian journalism imagines the world's "racing" to net-zero, pious UK urges Australia to "catch up". Maybe Joe Biden or the EU will be our climate cop.

Moralising aside, you could also say robust plans to rapidly relinquish fossil fuels look like a struggle for many advanced and resource-rich nations.

Even after 15 years, the landmark EU ETS scheme covers less than half of EU emissions. Technically, such schemes reduce atmospheric emissions. But coverage of industries, firms and GHGs is patchy. Doubtful "offsets" are allowed.

Whether or not net-zero gels, European nations also maintain industry and labour policies, pro-energy transition. Of interest to us and the U.S. is that lignite-laden Germany purports a legislated and phased exit from coal by distant 2038. With $US44 billion (AU$56.7 billion) to buy off workers, companies and states.

That's a manageable, if by no means a purist, carbon price. Analogously, could Australia afford to leave fossil fuels in situ by some set date?

I doubt that would be 2030, or 2035, as Greens suggest. Not after 2020's energy roadmap to nowhere. Not after the miners' effortless dismissal of Rudd in 2010.

After 2040, one could almost imagine farewelling coal. That's late in the day. Gas is harder. On its own, NT Beetaloo Basin could see the Coalition derail any Aussie net-zero.

Stephen Saunders is a former public servant, consultant and Canberra Times reviewer.

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