Crash Diet for Polar Bears . Polar bears hunt on sea ice, but with most of the ice now melting in Hudson's Bay in summer, they do not feed for weeks. Robins are migrating north in Spring an average of two weeks earlier than 23 years ago , and marmots in Colorado are emerging from hibernation 38 days earlier, said David Inouye and Kenneth Armitage, authors of a study published Feb 15 2000. See original scientific paper here . Packrats save climate records since the Ice Age.
Packrats are small western rodents who love to pick up interesting objects, which they store away.
And read about Packrats of the Grand Canyon . The large-scale conversion of forests to croplands in the midwestern United States over the last century has led to a measurable cooling of the region's climate. The cooling is the result of the changeover of the region to crops, which reflect more sunlight than forests. Some reports estimate that about 10 percent of the world's coral reefs have been killed. Read more here and here and here and here and here.