The Prime Minister announced that the two renewable energy agencies could now invest in 'low emissions' technologies, such as gas, rather than focus entirely on renewables.

The fate of a 50-year-old national park in western NSW is "at the mercy of water managers", as the battle for the Murray-Darling Basin hots up.

The possibilities of quantum computers are much-hyped but even the search for breakthroughs promises lucrative spin-offs.

They said it would never fill. Now it has spilled.

A wildflower superbloom is underway in a Californian desert after seven inches of winter rain.

More frequent severe droughts, coral bleaching are on the agenda with more extreme El Nino events predicted even with ambitious climate goals.

In the high country, there are echoes of old and bitter disputes over land, culture and identity.

Sydneysiders look set for a soggy commute to end the working week, as an intense low pressure system off the coast delivers widespread showers, wind and large and powerful surf conditions to the city.

Sydney is in for gusty winds on Wednesday, followed by chilly temperatures next week as Winter makes itself known.

Tasmanian devils with tumours the size of golf balls have had their cancerous growths disappear, after scientists successfully trialled a new way to kick-start the animals' immune system.

As veganism gains in popularity, it has also become more political, sparking a struggle between moderates and zero-tolerance purists.

There's no early sign of an end to what's beginning to feel like an endless summer for Sydney.

NSW will likely cop its third buffeting from an east coast low in five weeks but there is some good news.

Sydney will see temperatures exceeding 30 degrees on Thursday, before a "classic southerly buster" brings a 10-degree drop for the weekend.

Coal-fired power is on track to start shrinking globally by 2022, dimming prospects for exporters of the fossil fuel, including Australia.

It's the sort of anniversary you don't want to celebrate - a full year in which each month has set a new high mark for global temperatures.

Canberrans still wringing themselves out from the wettest June on record shouldn't put away their gumboots just yet.

Santos' main environment statement on its proposed $3 billion coal seam gas project in north-west NSW lacks key data on groundwater impacts, salt disposal, air pollution and biodiversity, government agencies have found.

Western Sydney had its coldest night since September as autumn-like conditions finally arrive in parts of the city.

Sydney has just experienced a perfect winter's weekend, with sunny conditions and the temperature reaching into the high teens.