claim: The cement, iron and steel, and petroleum refining industries could see their production cut by 21% 19%, and 11% respectively.”
evidence: The efforts of Al Gore and other environmental campaigns have focused on the effects of global warming and have managed to increase awareness and concern, but despite these efforts, the number of Americans believing humans are the cause of global warming was holding steady at 61% in 2007, and those believing the popular media was understating the issue remained about 35%.