David Corn

The U.S. managed to reach an eleventh-hour agreement with China, Brazil, South Africa, or India. But are the terms too vague and lenient to make a difference?

In his eight-minute speech, the U.S. president reprimanded the members of the Copenhagen summit for writing "empty words"

Copenhagen has proven that the world is not ready to sync policy with science. The best hope is to lay the groundwork for a more ambitious future treaty.

With a superpower standoff dominating the climate summit, Hillary Clinton attempts a game-changer.