Fresh water supplies are unlikely to keep up with global demand by 2040, increasing political instability, hobbling economic growth and endangering world food markets, according to a U.S.

The United States has offered North Korea up to $900,000 in emergency flood assistance but has made no decision yet on a broader request for humanitarian food aid for the isolated country, the Stat

Secretary of State Hillary Clinton pushed one of her simplest but potentially most transformative diplomatic priorities in India on Wednesday: clean cooking stoves.

Clinton, who last year launched a $50 million U.S.

Arctic nations agreed on Thursday to improve cooperation including on preventing oil spills as a thaw of ice and snow opens access to the remote region's rich mineral and petroleum resources.

The Arctic Council, comprising eight countries that surround the Arctic and representatives of indigenous Arctic peoples, signed a deal to split up search-and-rescue responsibilities as far as the North Po

Leaders of Arctic nations gather in Greenland this week to chart future cooperation as global warming sets off a race for oil, mineral, fishing and shipping opportunities in the world's fragile final frontier.

Secretary of State Hillary Clinton will join foreign ministers from seven other Arctic states in Greenland's tiny capital of Nuuk -- population 15,000 -- on Thursday for an Arctic Council