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World Wildlife Fund blames human threats to nature for biggest share of decline, particularly in tropical regions
Organizers say climate change crisis narrowing divisions between traditional green groups, reformist factions
Pact signed on Blackfeet territory establishes alliance among Native American groups to revive bison population
Republic of Kiribati President Anote Tong explains the challenges his country faces
President Obama signed a proclamation on Thursday to expand a marine reserve in the Pacific to 490,000 square miles
The Atikamekw are the latest to declare sovereignty over their ancestral territory in a bid to control resources
Oil giant wanted about 150 claimants to return $185M, but judge said a deal, as part of agreement not to sue, is a deal
As activists bemoan a lack of political will among world leaders, what can the rest of society do about global warming?
Long-term aim of the accord is to allow the free flow of the animals across the international border