Climate Change Alters Natural Ecosystems

"Around the world, scientists have found that climate change is altering natural ecosystems, making profound changes in the ways that animals live, migrate, eat and grow. Some species have benefited from the shift. Others have been left disastrously out of sync with their food supply. Two are known to have simply disappeared.

If warming continues as predicted, scientists say, 20 percent or more of the planet's plant and animal species could be at increased risk of extinction."