Santos's plan to develop coal seam gas in northern NSW has been found by an independent expert panel to lack key data that potentially underestimates impacts on threatened ecosystems and ground and surface water.

One of the state's healthiest koala colonies - and the last holdout of the animal in the Sydney region - is facing an increased threat

As a haze hung over Sydney on Saturday, residents in parts of Sydney were warned to avoid outdoor activities as the air quality reached 'hazardous' levels.

More than 2000 carp were removed from Canberra ponds in the annual cull.

Winter's grip will finally feel like it's loosened amid a "heat spike" this weekend - even if that season's squeeze was not a very tight one.

The NSW government has been accused of launching "the single biggest attack" on the National Parks and Wildlife service since it was set up half a century ago.

If you live in Melbourne, this season of renewal and regeneration can suck. These are the main reasons why.

Shark nets are back in the water for Sydney's beach but their effectiveness remains a contentious issue.

Prospects are improving for a wetter-than-average spring for coastal NSW but the shift away from the recent dry spell may not occur until later in the season, the Bureau of Meteorology says.

NSW has the most large-scale renewable energy projects under way in Australia, and lifted its share of clean energy markedly in the past year.

New techniques to identify and reduce the sources of sediment blanketing parts of the Great Barrier Reef have landed Andrew Brooks and his team at Griffith University's this year's Eureka Prize for environmental research.

The spectacular Cliefden Caves in central west NSW have been granted state heritage listing, almost certainly sparing them from a dam proposed for the region.

With no Noah's Ark to ferry these animals away, they're showing up in some unusual spots.

​Every year, Japanese boats with the word "RESEARCH" stenciled on the side head to the Southern Ocean to hunt for hundreds of whales.

A weak Clean Energy Target (CET) would shift the emissions reduction burden away from the electricity sector, undermine investor certainty, and potentially leave power stations pumping out pollution into the next century, according to analysis by RepuTex.

Sydney's main weather radar at Terrey Hills will be offline for more than a month for an upgrade ahead of this year's thunderstorm season.

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As the oil and gas capital of the world, Houston should have known storms like Harvey were coming.

Sydney is likely to post one of its coldest weeks of winter just as the season makes way for a burst of spring.

Claims that Shenhua's restricted coal mining will avoid affecting the aquifers of the rich farmlands of the Liverpool Plains are "false and ignorant", former state and private agronomists have said in a letter to Premier Gladys Berejiklian.

Australia produced enough renewable energy to power more than 70 per cent of households last financial year, new data shows, but advocates warn the booming industry will flounder unless the Turnbull government commits to a clean energy target.

The billionaires have joined other business giants backing a start-up that makes meat from self-producing animal cells.

The biggest overhaul of native vegetation laws in NSW in a generation is sending mixed signals.

At least eight people were killed and many are still missing after one of the strongest typhoons on record barrelled into southern Chinese territory of Macau.

Although the gift may have seemed like an appropriate gesture, it has been criticised by animal rights campaigners.

The unusually warm and dry winter across much of NSW has prompted the Rural Fire Service to bring forward the official start to the fire season for nine local government areas including the Blue Mountains.

The paucity of independent monitoring of waste water from coal mines in NSW is leaving communities exposed to decades of pollution, long after mining operations have ceased, Ian Wright, a leading water ecologist, said.

Weather agencies including Australia's must step up cooperation to close a "widening gap in capacity" with developing nations, with the urgency of action increasing as the planet heats up, David Grimes, president of the World Meteorological Organization, says.

Coal mining in Sydney's catchment is having a "cumulative and possibly accelerated" impact on water flows but its full effect is unknown because of a lack of data and monitoring.

There's more to protecting yourself than wearing an ice cream bucket on your head.

Damaging winds are forecast to batter Sydney well into the weekend, keeping emergency crews busy clearing downed trees and powerlines, and restoring electricity to affected homes and businesses.