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The highly threatened subspecies has been brought back to a reserve in Niger after a 50-year absence.

California’s ARB is slated to discuss the cap-and-trade amendments at its December board meeting, potentially enabling the state agency to approve those changes this year.

UN aviation body ICAO has once again postponed decisions on eligible credits and cleaner fuels under its CORSIA global offsetting mechanism, miring it in further uncertainty as the EU takes steps to safeguard its ability to continue regulating flight emissions.

Sediment cores drilled from Swiss lake reveal it took 300 years to bounce back after Romans departed

All over the world lakes are in trouble. An excess of nutrients – from fertilisers, detergents and sewage – is upsetting the balance of life, leading to algal blooms and bottom-water dead-zones. Many places are now trying to clean up their act, but how long does it take for a lake to recover?

Sediment cores drilled from a Swiss lake reveal how long it took for the lake to bounce back after the Romans departed, and indicate we might have to wait centuries for today’s polluted lakes to become properly fresh again.

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An energy transmission network between Australia and Indonesia could help both nations achieve 100% renewable electricity by 2050. Roger Dargaville, Senior lecturer, Monash University Changlong Wang, Researcher, The Energy Transition Hub, University of Melbourne Scott Hamilton, Strategic Advisory Panel Member Licensed as Creative Commons – attribution, no derivatives.

EU carbon prices nudged higher for a second straight day on Tuesday, boosted by a strong auction result, though market participants remained braced for more volatility ahead.

The continuation of the CDM and its CER credits when the Paris Agreement takes effect in 2021 has emerged as a major point of contention in the early days of the UN climate summit in Poland, as developers and NGOs remain widely split on the issue.

Defeat by gilets jaunes will make others think twice before taking similar steps to cut emissions

Emmanuel Macron’s defeat by the gilets jaunes (yellow vests) movement over a proposed eco-tax rise is likely to come as a painful lesson for environmental policymakers at this week’s UN climate talks in Katowice.

After the most violent protests in Paris for half a century, the French president has been forced to postpone a planned eco-tax rise on fuel, showing how ecological measures can have explosive consequences if there is any suggestion they are being used to “greenwash” austerity.

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Shortage of female swift parrots caused by sugar gliders wreaking ‘havoc’ on mating

Tasmania’s critically endangered swift parrots are facing a new threat to survival – polyamory.

A study by researchers at the Australian National University, published in the Journal of Animal Ecology, has found that a chronic shortage of female swift parrots caused by intensive predation by sugar gliders has wreaked havoc on the bird’s usually monogamous breeding habits and lowered the survival rate for young hatchlings.

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New Mexico should impose an escalating carbon tax or install a cap-and-trade programme across large emitting sectors if it wants to reach its long-term emissions goals, a new report has proposed.

Market participants anticipate Wednesday's RGGI auction will clear at a 10- to 15-cent discount to the secondary market, bucking a recent trend of above-market settlements.

The French government is suspending the imminent increase of its domestic carbon tax on fuel and power, backing down to pressure following weeks of violent protests in Paris.

A spectacular sight lights up the sky as Venus and the moon rise together

Bernie Sanders and Alexandria Ocasio-Cortez emphasized need to ‘transform our energy system’ but did not discuss how to pursue it

A star-studded progressive town hall on climate change drew thousands of viewers online and hundreds in person – but offered little insight into how the US left might overcome Republican opposition and lay the groundwork to limit rising temperatures.

Related: David Attenborough: collapse of civilisation is on the horizon

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The 1954 letter about religion is expected to fetch up to $1.5 million at auction in New York.

This and Turnbull's observations on energy policy provided abundant material for a question time attack by Labor bloated from dining on the unending manna that's been flowing from political heaven. Michelle Grattan, Professorial Fellow, University of Canberra Licensed as Creative Commons – attribution, no derivatives.

A launch is delayed due to mouldy food bars, meaning the worms could be a day too old for research.

Greta Thunberg, 15, told UN summit that students are acting in absence of global leadership

Action to fight global warming is coming whether world leaders like it or not, school student Greta Thunberg has told the UN climate change summit, accusing them of behaving like irresponsible children.

Thunberg began a solo climate protest by striking from school in Sweden in August. But more than 20,000 students around the world have now joined her. The school strikes have spread to at least 270 towns and cities in countries across the world, including Australia, the United Kingdom, Belgium, the US and Japan.

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The UN has identified six action areas with a high potential to drive GHG reductions and resilience as it encourages countries to bump up their Paris Agreement targets at a New York conference next September, Secretary-General Antonio Guterres announced on Tuesday.

The BES photography contest features images by ecologists and students and captures rare flora and fauna from around the world. The overall winning picture, by Chris Oosthuizen, shows an adult king penguin surrounded by chicks on Marion Island

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