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

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.

Wayne "Bronco" Lunn has endured many summers in the shearing business in north-western NSW over four decades but he's never seen one like this year's.

• ANALYSIS

Pointing our solar panels in the wrong direction is only one quirk in our strained energy system.

The Turnbull government's recent embrace of coal-fired power shows it has "abandoned all pretense of taking global warming seriously", prompting Clive Hamilton to resign as a member of the Climate Change Authority.

The most extensive heatwave of the summer is building over inland Australia, setting up Sydney and much of the state for record-tilting heat over the coming weekend.

A gigantic, powerhouse winter storm is charging through the North Atlantic and threatens to flood the high Arctic with abnormally mild air.

Sydneysiders are sweltering through a hot and sticky Sunday, with temperatures passing the 30-degree mark since 9.30am.

Climate science at the CSIRO is bouncing back one year after executives modelled its demise, securing new revenue streams in the Pacific and China and looking to hire new staff.

"We are all very worried here," Rahmstorf, a professor at the Potsdam Institute for Climate Impact Research, says.

Less than one dollar in a thousand spent on health in Australia goes to one of the biggest threats facing the sector, a new paper finds.

Australia's top business groups have cautioned the government against making any more changes to the renewable energy target.

Sydney has marked its hottest ever month, with extended warm spells setting records at all metropolitan sites.

An unusually quiet period for cyclones in the Australian region may come to an end within days.

How tiny Huonville does well by doing good on the environment front.