The peaks above Yellowstone are turning a sickly gray as trees die from a beetle infestation. In an audio slideshow, OnEarth articles editor George Black describes the scene from a recent flyover.
A tree that holds a special place in the western United States is being wiped out by a beetle infestation. But the real culprit behind their destruction is climate change. Scientist Jesse Logan explains why.
With a vital food supply at risk because of climate change, the government could not have picked a worse time to remove the grizzly bear from the endangered species list