The polar bear is among the earliest and most dramatic victims of global warming. Yet Andrew Wetzler, a Chicago-based wildlife attorney for NRDC, sees good news in recent U.S. proposals to protect them.
What does it take to get a pine tree on the endangered species list? NRDC ecologist Sylvia Fallon explains. She's fighting to save a fixture of Yellowstone and a major food source for grizzly bears.