7/23/2008

Former Supporter of Man-made Global Warming Theory Changes His Mind

Brit Hume had this story last night on his Fox News show:

A former global warming alarmist and creator of the model that measures Australia's compliance with the Kyoto Protocol says that while global warming is real, there is no evidence that the main cause is carbon emissions. David Evans says that C02 emissions play — at most — a minor role.

Evans writes in The Australian newspaper that if global warming was caused by C02, scientists would have found hot spots about six miles up in the earth's atmosphere over the Tropics. Evans describes those hot spots as the signature of the greenhouse effect. He says scientists have been trying to locate them for years using thermometers attached to weather balloons.

But he says years of research "show no hot spot — whatsoever" adding that "an increased greenhouse effect is not the cause of global warming."

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