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...