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Give Me a Break: Global Warming

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Uploaded on Aug 6, 2008

The globe is warming, but is it really all our fault? And is it true the debate is over? No. What you think you know may not be so. Over the next 100 years, sea levels are expected to rise seven to 24 inches, not 20 feet says the IPCC. Polar bears appear to be doing all right. Right now data from the World Conservation Union and the U.S. Geological Survey show most populations of polar bears are stable or increasing. A real inconvenient truth is that historically carbon dioxide increases came after temperatures rose, usually hundreds of years later. Climate changes, always has, with or without man. Early last century, even without today's huge output of carbon dioxide, the Arctic went through a warming period. Greenland's temperatures rose 50 percent faster in the 1920s and reached higher average temperatures in the 1930s and 1940s than today's temperatures. Some scientists argue the warming might be caused by changes in the sun, or ocean currents, or changes in cloud cover, or other things we don't yet understand. The truth is, that while everyone agrees that the earth has warmed, lots of good scientists don't agree that it's mostly our fault, and don't agree that it's going to be a catastrophe. The debate is not over.

http://abcnews.go.com/2020/Stossel/St...

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