Australian authorities say the Great Barrier Reef has experienced its greatest annual loss of live coral in four decades.

Final negotiations on a treaty to end plastic pollution are underway in Geneva. But with the United States lining up in ...

A remote Pacific nation has started selling passports to fund climate action, but is so far struggling to attract new citizens to the low-lying, largely barren island.

Some researchers say sunscreen and tailored clothing might have helped humans survive when Neanderthals went extinct.