A pinch of powdered chimpanzee bone, some gecko saliva, a dash of vulture brain.

The Sydney Opera House and Harbour Bridge went dark for an hour Saturday to kick off a global campaign raising awareness about the impacts of climate change.

Humanity is risking its own well-being by over-harvesting and harming Nature's bounty, said a comprehensive survey Friday that warned animal and plant species were in decline in every world region.

Harmful carbon emissions from energy rose in 2017 for the first time in three years, the International Energy Agency said Thursday, proof that the world's efforts to fight climate change are falling short.

Australia recommended opening more of its marine parks, including near the Great Barrier Reef, to commercial fishing Wednesday in a decision slammed as the worst downgrading of a protected area in the world.

More of a giant France-sized glacier in Antarctica is floating on the ocean than previously thought, scientists said Tuesday, raising fears it could melt faster as the climate warms and have a dramatic impact on rising sea-levels.

Governments should focus on "greener" policies to improve the supply and quality of water as climate change and a growing global population threaten the water security of billions, the United Nations said on Monday.

Israel and Jordan have long pursued a common goal to stop the Dead Sea from shrinking while slaking their shared thirst for drinking water with a pipeline from the Red Sea some 200 kilometers away.

Brazil -- the country with the world's greatest fresh water reserves -- hosts an international conference next week on growing fears over the fragility of drinking water supplies in a heating planet.

Under the slogan "sharing water," the 8th World Water Forum will bring together 15 heads of state and government, 300 mayors and dozens of experts in the Brazilian capital Brasilia from Sunday to March 23.

With the number of endangered orcas that frequent the inland waters of Washington state at a 30-year low, Gov. Jay Inslee on Wednesday directed state agencies to take immediate and longer-term steps to protect the struggling killer whales.

The fish-eating mammals that spend time in Puget Sound have struggled for years with a lack of food, pollution, noise and disturbances from boat traffic. There are now just 76 of the orcas, down from 98 in 1995.