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G20 fudges on fossil fuel subsidies, now labelled as the "dumbest policy" in the world. But the Paris climate deal is now likely to come into force later this year, four years earlier than thought, and China has announced a major boost to "green finance", just as Australia looks to strip its own greed funds.

Whether EVs will be charged from rooftop panels – as Tesla etc would like it – or from a network of charging stations – as utilities would like it – it is only a matter of time.

Worker at sanctuary suffers cuts to her face after entering eagle enclosure on Tuesday morning

A wedge-tailed eagle has attacked a female staff member at the Gold Coast’s Currumbin wildlife sanctuary, leaving her with cuts to her face.

The woman, believed to be in her 30s, was attacked at about 8.30am on Tuesday and was taken to Gold Coast university hospital in a stable condition.

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Dear Craig Kelly, your electorate in southern Sydney has 9,500 voters who live in solar powered homes. This year they will save over $2.9m on their power bills.

Council unanimously passes motion calling for policy that would remove more than $500m from banks that invest in fossil fuels

The City of Sydney council is set to divest from fossil fuels this year, regardless of the outcome of the election on Saturday, after a two-year campaign by members of the anti-fossil fuel group 350.org.

The council has more than $500m under management. At the last meeting before the election, it unanimously passed a motion calling for a new investment policy that would divert those funds away from banks that invest in fossil fuels.

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New research suggests air pollution could be contributing to diseases such as Alzheimer's.

Panorama programme claims there are numerous, potentially lethal safety flaws at the Cumbria nuclear plant

The Sellafield nuclear site is riddled with potentially lethal safety flaws, according to a BBC investigation.

The Panorama programme, broadcast on Monday night, uncovered a raft of safety issues on the site in Cumbria which stores almost all of the country’s nuclear waste.

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Wild horses are wreaking havoc in Australia's mountains Long Road Photography (formerly Aff)/Flickr, CC BY-NC-ND

The fate of wild horses in Australia’s alps is once again stirring passions, particularly the idea of shooting them. The suggestion has prompted street protests against it, and public statements from academics (including myself) endorsing the idea.

Victoria and New South Wales have not yet made decisions on what to do about the horses. In New South Wales, public comment has closed on the Kosciuszko National Park Draft Wild Horse Management Plan 2016, and now public servants have to weigh up the comments, take heed of political fears and sensitivities, and come up with a way forward.

Victoria’s Greater Alpine National Parks management plan has been tabled in parliament, arguing for feral horse control but leaving options open.

The evidence that wild horses need to be removed from Australia’s alps because of their impact on high country ecosystems and species is very strong. The debate now revolves around the ethics of how to remove horses, and their role in Australian culture.

Horse welfare

This issue of horse welfare has recently been substantially clarified in a report as part of reviewing the Kosciuszko plan. The report, prepared by an Independent Technical Reference Group, scores the welfare outcomes of a full range of horse control, considering pursuing horses, capturing and transporting them, and their ultimate fate.

Although a common perspective is that it would be nice to round up the horses and move them out of the national park, it turns out that this would result in one of the worst animal welfare outcomes.

The vast majority of horses captured (82%) in Kosciuszko National Park are not re-homed, but killed in abattoirs. The long journey to abattoirs in South Australia and Queensland was ranked as having a severe impact on horse welfare, rated seven out of a maximum score of eight.

In contrast, aerial shooting, when properly implemented by well-trained pilots and marksmen, had a moderate effect on horse welfare during the short chase (rated four out of eight), and there were no concerns about suffering when the horse is shot, as it is quickly killed.

Even fertility management had an impact rated six out of eight (and cannot be implemented at the scale needed to solve the Kosciuszko horse problem).

Animal welfare in the environment

There are around 10,000 wild horses in Australia’s alps, and 6,000 in Kosciuszko. By eating and trampling habitat, horses likely cause many individual native animals to suffer. These impacts are generally unseen, and are typically neglected when considering the ethics of culling horses.

Horses have a negative impact on alpine ecosystems, upon which native species depend, including the broad-toothed rat and the alpine water skink(critically endangered in Victoria).

In all arguments about culling invasive animals (or over-abundant native animals) it is a fundamental logical mistake to ignore the impacts of pests on the welfare of other animals, on the viability of populations and on the risk of species' extinction.

In his article A “Practical” Ethic for Animals, animal welfare expert David Fraser proposes four principles that, if applied, would ensure full consideration of the ethics of culling horses.

There are:

(1) to provide good lives for the animals in our care

(2) to treat suffering with compassion

(3) to be mindful of unseen harm

(4) to protect the life-sustaining processes and balances of nature.

This set of principles gives weight to both humane control methods, as well as suffering of other species if the culling is not undertaken, impacts on populations and risks of extinction.

While it is nicer if you don’t have to kill horses, when you weigh up the misery horses suffer if left in the wild, the unseen impacts on native animals, the damage to ecosystems and the likely heightened risk of extinction of already threatened species, leaving horses in the Australian alps is not a choice with ethics on its side.

Part of Australian culture

A cultural affiliation with horses is widespread around the world, including in the US, Spain and many South American countries.

Australia is no exception, epitomised by the poem “The Man from Snowy River)” by Banjo Paterson. This stock horse culture is widely celebrated in Australia. We saw it at the Sydney Olympics opening ceremony where stock horses were celebrated alongside those other classic Australian icons of lawnmowers and clothes lines.

Culture can be celebrated in a range of ways. We don’t celebrate the Gallipoli landing using actual violence, we don’t celebrate anniversaries of the moon landing by sending astronauts there.

We don’t need to celebrate Australia’s stock-horse culture by having horses in fragile alpine ecosystems where they cause environmental damage. There are other ways to celebrate culture, including through the network of mountain huts, many originally built for men rounding up cattle or horses. Indeed, there is already extensive signage highlighting this cultural history at huts around Victoria.

There may also be ways to maintain small wild-horse populations through collaborations across private properties around the mountains of NSW and Victoria. These would open up opportunities for tourism by providing “man-from-snowy-river” cultural experiences in places more appropriate than our national parks.

Australia has one of the largest feral horse populations on the planet, with 400,000 horses roaming the country. Areas set aside for nature cover less than 10% of New South Wales and 17% of Victoria. There is plenty of space outside reserves for horses, but conversely, very little area set aside for our natural heritage.

Considering the ethics of balance, one that takes into account humane treatment of horses, native wildlife, species and ecosystems, horses should be rapidly and humanely removed from alpine parks in Victoria and New South Wales.

Don Driscoll is affiliated with the Ecological Society of Australia and the Society for Conservation Biology.

Detection of ‘abundant’ magnetite particles raises concerns because of suggested links to Alzheimer’s disease

Toxic nanoparticles from air pollution have been discovered in human brains in “abundant” quantities, a newly published study reveals.

The detection of the particles, in brain tissue from 37 people, raises concerns because recent research has suggested links between these magnetite particles and Alzheimer’s disease, while air pollution has been shown to significantly increase the risk of the disease. However, the new work is still a long way from proving that the air pollution particles cause or exacerbate Alzheimer’s.

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John Harris provides, as usual, an excellent piece on what is wrong with British politics (Politics can’t heal until politicians stand clear of the revolving door, 3 September). However, former politicians and functionaries moving to lucrative jobs in the private sector and people from the private sector moving to less lucrative but influential positions in government is neither new nor a particularly British or European malady. What is missing from Harris and sadly from the Guardian in general is the recognition that this is how capitalism works at home, and is a key feature of how capitalism works globally.

How often do we hear the plea from politicians, functionaries, and corporate executives exposed for questionable practices that they were “doing nothing wrong”. In the strictly legal sense this is often correct, but it only highlights how capitalism and the state work hand in hand. Corporate sponsorship of the Paris climate change meetings is only the most important of recent manifestations of this phenomenon, in this case not only helping to explain why people around the world appear to be losing faith in conventional politics, but also why so little is done to get to the roots of why fossil-fuelled capitalist globalisation has been allowed to put the very existence of the planet at serious risk.
Leslie Sklair
London

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IUCN report warns that ‘truly staggering’ rate of warming is changing the behaviour of marine species, reducing fishing zones and spreading disease

The soaring temperature of the oceans is the “greatest hidden challenge of our generation” that is altering the make-up of marine species, shrinking fishing areas and starting to spread disease to humans, according to the most comprehensive analysis yet of ocean warming.

The oceans have already sucked up an enormous amount of heat due to escalating greenhouse gas emissions, affecting marine species from microbes to whales, according to an International Union for Conservation of Nature (IUCN) report involving the work of 80 scientists from a dozen countries.

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Much of Earth's life-giving carbon could have been delivered in an asteroid collision about 4.4 billion years ago, a theory suggests.

Ice taken from a retreating Alpine glacier is moved into a freezer at the start of a mission to store it permanently in Antarctica.

Ice taken from a retreating Alpine glacier is moved into a freezer at the start of a mission to store it permanently in Antarctica.

Giant storms that wreak havoc across China, Japan, Korea and the Philippines have grown 50% stronger in the past 40 years due to warming seas

The destructive power of the typhoons that wreak havoc across China, Japan, Korea and the Philippines has intensified by 50% in the past 40 years due to warming seas, a new study has found.

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Europe's comet lander Philae, last seen in November 2014, has been identified in new pictures from the Rosetta probe.

Fans of the panda are celebrating its removal from the endangered list – and it’s not the only species to have been pulled back from the brink

The most famous thing about pandas, apart from them spending all day eating bamboo and not having sex, is how endangered they are. However, the animal has just been moved off the “endangered” species list by the International Union for Conservation of Nature (IUCN). Although the giant panda is still considered “vulnerable”, its population is much healthier – there are thought to be 1,864 adults, and although there isn’t a definitive number of cubs, the total population now exceeds 2,000. It is, noted the IUCN report, “a positive sign confirming that the Chinese government’s efforts to conserve this species are effective”. Few conservation measures have been as intensive or high profile. The work included increasing the number of panda reserves, protecting forests (such as reforestation and banning logging in panda habitats) and creating “corridors” so isolated wild panda populations can mix and strengthen the gene pool. Anti-poaching patrols, and moving humans out of reserves also helped. Pandas are still at risk, particularly from a reduction in bamboo availability due to climate change, but it shows conservation efforts pay off. Here are some other animals that have been brought back from the brink:

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Freddie Mercury is honoured with an asteroid named after him to mark what would have been his 70th birthday.

Letter from 36 MPs urges Theresa May to redirect billions of pounds of post-Brexit subsidies towards environmental and public services

Dozens of Conservative MPs have written to the prime minister, Theresa May, urging her to shift billions of pounds of post-Brexit farm subsidies towards protecting and improving the environment.

The 36 MPs, including former environment ministers, also urge May to maintain the strong protection for wildlife and water provided by EU directives. During the EU referendum campaign, farming minister George Eustice campaigned for the leave camp and said the directives were “spirit-crushing” and “would go”.

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Human skulls and other artefacts found aboard the Tudor shipwreck, the Mary Rose, are being exhibited online for the first time.