Keep Earth Green

Unless the pace of global warming slows 或者 stops, polar bears could disappear within a century, says a 大学 of Alberta expert in Arctic ecosystems.

While it has been known for some time that the polar 熊 is in trouble, new research shows that Arctic ice - the polar bear's primary habitat - is melting much faster than scientists had believed, says U of A biologist Dr. Andrew Derocher.

"The climate predictions coming out are 展示 massive changes in sea-ice distribution," 说 Derocher, who follows polar bears to see how they adapt to changing conditions. If the predictions are correct,...