Unlike most other environmental problems, you can't see it, smell it, taste it or touch it--and that's allowed many people to ignore it or deny it's happening.
At Kenai National Wildlife Refuge in Alaska, climate change isn't a distant threat--it's a painful reality.
Ten aspects of global warming are highlighted, using different species to illustrate how each impacts the natural world. No canaries here, but that doesn't mean the coal mine is safe.
Think you can't do anything to stop global warming? Think again.
Scores of imperiled animals are killed illegally every year in America. Scott Bragonier and his collegues aim to bring the killers to justice.
Indian tribes in Montana and elsewhere are working to return buffalo herds to their lands.