The world is 33 months into its biggest recorded coral bleaching event with little sign of it ending, raising the prospect that coral mortality on the Great Barrier Reef will increase "significantly" from the quarter already lost in the past year, scientists say.

The unprecedented death of Australia's northern mangrove forests has been put down to a lack of water.

Over the past three years, almost all of the world's reefs have experienced summertime heat stress.

The great bulk of Australia's largest listed companies are failing to disclose their exposures to climate change.

"It is altering the structure and function of natural ecosystems, and affecting heritage, economic activity and human wellbeing."

Poor countries have contributed the least to human-induced climate change but are already being affected more than richer ones.

Antarctic Bottom Water is a thing, and it's one worth getting into the discussion about the consequences of climate change.

NSW should place a cap on the amount of thermal coal it can mine and plan an orderly phase-out of the industry within a decade to do its bit to avoid catastrophic climate change, NSW Greens say.

Sydney's record-breaking weather juggernaut rolls on, with summer confirmed as the city's hottest for both days and nights over records stretching back 157 years.

There is about 10 per cent less sea ice in Antarctica this year than the previous record minimum.

Australia's greenhouse gas pollution jumped in 2015-16 as coal use continued to rise after the scrapping of the carbon price, making it harder to meet its emissions targets.

Brisbane-based Qantas engineers have spent the best part of the past month installing sensitive atmospheric monitoring sensors on a Hawaiian Airlines Airbus A330 in a bid to fill a major gap in global climate research.

The sodden and cool tail of February belies the record-breaking summer, with autumn also likely to be unusually warm.

Parts of the Great Barrier Reef are enduring periods of heat stress worse than during last year's record-breaking coral bleaching event.

The Victorian government is demanding the operator of Australia's main electricity grid explain how the state came close to losing electricity during the recent extreme heatwave to ensure NSW avoided power outages, adding to calls for a wider inquiry.

A new wave of solar energy is about to crest and it won't just be households benefiting.

Six ocean hot spots that teem with the biggest mix of species are also getting hit hardest by global warming and industrial fishing, a study has found.

Hundreds of scientists, environmental advocates and their supporters have rallied in Boston to protest what they see as increasing threats to science and research in the US.

The Trump administration is preparing to roll back Obame-era environmental safeguards as Scott Pruitt prepares to take head up the Environmental Protection Agency.

"All the arrows are pointing in a very bad direction," says Danny Price, who sits on the government's Climate Change Authority.

Boston: Woolly mammoths - or, at least, animals with very similar DNA - could be brought back from extinction within two years, say scientists behind a ground-breaking resurrection project.

Labor's climate change spokesman Mark Butler has dismissed as "rubbish" widely circulating claims that Federal ALP had dropped its goal of achieving half of the nation's electricity will be supplied by renewable sources by 2030.

The amount of oxygen in oceans around the world has declined, a long-predicted result of climate change, scientists have revealed.

Unusually warm sea temperatures and the prospect for more to come have reef scientists worried that the Great Barrier Reef may experience another major coral bleaching event. And Sydney is also under threat.

The booming market for home storage could be thrown into disarray if proposed safety guidelines force owners to move their battery units outside.

Fossil fuels will be, by far, the predominant factor in the early deaths of Australians by mid-century.

• COMMENT

Consumers are voters and they won't forget who is to blame if there's a meltdown in our nation's energy supplies.

Meteorologists were predicting NSW would set a state-wide record for February warmth during the current heatwave but few would have tipped the mark would be broken two days in a row.

Human activity heats up cities to such an extent that on the weekends when we're having a sleep-in, the centre of town is measurably cooler.