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Coal-fired cars? Climate campaigner John Hewson promotes discarded technology that his business partners say could turn coal into a "universal fuel" and ensure long-term survival of coal industry – in Latrobe Valley and elsewhere. Environmental campaigners are horrified.

According to BNEF, used electric vehicle batteries will amount to 29 GWh by 2025.

Queensland woman says she had to fight the animal after finding it had her daughter pinned to the ground

A Queensland mother has wrestled and kicked a kangaroo to save her two-year-old daughter at their Hervey Bay home.

Argie Abejaron told the Fraser Coast Chronicle she had heard her six-year-old son scream on Tuesday and had run outside to see the kangaroo had pinned her little girl, Mileah, to the ground and was attacking her.

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A kindly offer of a lift — or something much darker?

MS Explorer was the first cruise ship to hit an iceberg since the Titanic.

The small mammal – ‘one of the cutest animals in America’ – is struggling to survive as summers get hotter and drier

Populations of a rabbit-like animal known as the American pika are vanishing in many mountainous areas of the west as climate change alters its habitat, according to findings released by the US Geological Survey.

The range for the mountain-dwelling herbivore is shrinking in southern Utah, north-eastern California and in the Great Basin that covers most of Nevada and parts of Utah, Oregon, Idaho and California, the federal agency concluded after studying the mammal from 2012-2015.

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LOVE IN A TORRENT: Some frogs have evolved ultrasonic mating calls so they can be heard above the background rumble of the fast-flowing streams they depend on, say researchers.

Application on ecological sustainability – call for public comments open from 26 August 2016 – 29 September 2016

Proposed rule change that could fast-track deployment of battery storage in Australia put on hold, a week after regulator was criticised by energy ministers for slow decisions.

How 98 aftershocks rocked devastated areas of central Italy in the first 36 hours after the earthquake.

Australia's island wildlife is particularly vulnerable to invasive species. Roderick Eime/Flickr, CC BY

Australia has some 8,300 islands, many of them home to threatened species. But humans have introduced rodents and predators such as feral cats and foxes to many of these islands, devastating native wildlife and changing entire island ecosystems. Removing invasive mammals has proven to be a very effective tool for protecting island species.

As a result, the federal government has made it a priority to remove invasive vertebrates from islands where they pose the most severe threats to native plants and animals.

But choosing where to remove those invasives is difficult. We don’t have complete information about the distribution of native species and threats across the nation’s 8,300 islands, and we haven’t been able to predict where eradication will have the most benefit.

However, in a recent study published in Nature Communications, our global team of scientists looked at islands around the world to consider where we can get the biggest bang for our buck.

Eradicating cats, rats and pigs from Flinders Island in Tasmania would help save forty-spotted pardalotes. Francesco Veronesi, CC BY-SA It costs money to save species

The total cost of the recently completed rat and rabbit eradication on Macquarie Island was A$27 million. The proposed removal of rats from Lord Howe Island off New South Wales is expected to cost A$9 million.

Federal Environment Minister Josh Frydenberg has just announced funding to remove feral cats from five islands: Christmas Island, Dirk Hartog Island and the French Islands in Western Australia; and Bruny and King Islands in Tasmania.

Conservation dollars are limited, so it is important that these pricey interventions be focused on the islands where they will go the furthest toward conserving native island biodiversity.

Conversely, it is essential that we identify places where they won’t provide much benefit, either because a threatened species is likely to go extinct regardless of such interventions, or because the invasive species actually poses little threat.

It cost A$24 million to eradicate rats and rabbits from Macquarie Island. Macquarie Island image from www.shutterstock.com Island life

We analysed the effects of invasive mammals on 1,200 globally threatened species across more than 1,000 islands to develop a model for where eradicating invasive wildlife will provide the greatest benefits to island species.

We estimate nearly half of threatened species populations on islands could disappear without conservation efforts. But targeted eradication could prevent 40-75% of these losses.

We found that just a few types of invasive mammals – rats, cats, pigs, mongooses and weasels – are most strongly associated with the disappearance of native species from islands.

Importantly, our study shows that the impacts of invasive mammals vary widely across the type of native species (native amphibians, birds, reptiles or mammals) and the conditions of the islands on which they live.

For example, we found that removing invasive mammals from small, dry islands could halve the extirpation risk for threatened native birds and mammals, but doing so on large, wet islands would have less benefit.

Australia’s most important islands

Our study included thirty-three Australian islands, home to 17 species of globally threatened birds, mammals and amphibians including the woylie (or brush-tailed bettong), Tasmania devils, black-browed albatross and Cooloola sedgefrog.

Eighteen of these islands are also home to introduced rats, cats or pigs, which potentially threaten native species with extinction.

Traditionally, we might assume that eradicating cats and rats would always reduce bird extinctions. However, our study suggests otherwise.

Eradicating cats and rats could help northern quolls on some islands. Quoll image from www.shutterstock.com

Rat or cat eradication may have little benefit on some islands. This is either because these invasive species have relatively minor impacts in some island environments, or because the native population is likely to go extinct regardless of conservation interventions.

So our study shows that of these 18 islands, eradicating invasive species on only two would likely prevent extinction of three native species populations. These are the eradication of cats and rats on Groote Eylandt in the Northern Territory, which would avert the extirpation (that is, the island-level extinction) of the northern quoll and northern hopping mouse; and the eradication of cats, rats and pigs on Flinders Island in Tasmania, which would avert the extirpation of the forty-spotted pardalote.

While this sounds like a tiny number, remember we haven’t looked at all of Australia’s islands and the species that live on them. Indeed, we only included species considered threatened at a global level. For the other islands not included in our study, species threatened with extinction at regional or national scales may - or may not - benefit from eradicating invasive species. As more information comes in on these islands, our analysis can suggest which of these we should focus on.

The authors do not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and have disclosed no relevant affiliations beyond the academic appointment above.

The rules of acceptable behavior in the national parks have changed drastically over the past 100 years. It was once legal to drive through trees, ride waterfalls, and boil an egg in the Yellowstone hot springs – but now such actions are generally frowned upon

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With respect to Professor MacDonald (Letters, 22 August), a recently published analysis of peer-reviewed literature between 2009 and 2015 demonstrates that 84% of the studies contain findings that indicate public health hazards, elevated risks or adverse health outcomes in fracking areas, all of which were confident no doubt that their regulations were world class. There are similar high levels of anxiety concerning water and air quality in fracking areas.

The professor does not share with us what it is, other than the industry’s assertion, that makes our UK system of regulation, not yet tested for shale, so watertight. Her last paragraph sits ill from an academic and hardly withstands the most cursory scrutiny: how can an untried system be world class – despite the “study after study undertaken in the UK by renowned universities”? How do we know? It is not enough that Public Health England “recognise that concentrations [of radon released by fracking to the environment] are not expected to result in significant additional radon exposure”. What kind of assurance is this?
David Cragg-James
York

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A tiny marsupial lion, extinct for at least 18 million years, is named after Sir David Attenborough after fossilised remains are found in remote Australia.

The south-eastern edge of Yellowstone National Park in Wyoming takes a week of backpacking to hike in and out and is populated by wolves and grizzly bears

• 100 years of the National Park Service: readers’ photo and stories
• 10 of the least-visited US national parks

The most remote place in the contiguous 48 states, the farthest you can go to get away from it all – the only place you can be more than 20 miles from a road – is deep in the south-eastern corner of Yellowstone National Park in Wyoming.

Related: 'We need to preserve this beauty': your memories of US national parks

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Scientists have used satellite images to study how the water on the Earth's surface has changed over the last 30 years.

To celebrate 100 years of the National Park Service, we asked you to share what America’s natural wonders mean to you

The National Park Service turns 100 this week, and to celebrate its century of protecting American’s most treasured places, we asked you to share your memories and photos of the parks. Here’s a selection of your contributions. You can see all of them – and share your own – here.

Related: Celebrating 100 years of the National Park Service: readers' photo and stories

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The first almost complete skeleton of a dodo to come up for sale in nearly 100 years is expected to fetch a six-figure sum at auction.

Amateur rocket enthusiasts have gathered in Scotland to mark 30 years of aiming for the skies.

Majority of British public polled support protections at least as strong as current EU rules and many think farming subsidies should focus more on environmental protection

An overwhelming majority of the British public polled want new post-Brexit laws protecting wildlife and the countryside to be at least as strong as the EU rules currently in place, according to a opinion poll published on Thursday.

Many also want a new farming subsidy regime to emphasise environmental protection more than the EU’s existing Common Agricultural Policy and the vast majority want an EU ban on neonicotinoid pesticides, known to harm bees and other pollinators, to remain in place.

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