The survey found that 50 percent of Americans "are convinced the climate is changing" and another 34 percent believe it "is probably changing." Duke said this is the highest level of belief in climate change since 2007. By way of comparison, a Gallup poll released in March 2012 found that 30 percent of Americans worried about global warming "a great deal" and another 25 percent worried about it a "fair amount."
The new Duke survey also found that 54 percent of respondents felt that climate change is primarily the result of human activity and that 64 percent either strongly or somewhat favored new regulations on greenhouse gas emissions from power plants, factories and cars. The respondents also supported requiring utilities to source more of their power from technologies that emit less carbon, including wind, solar, natural gas and nuclear energy.
But the survey did not find much support for new taxes on carbon emissions. Only 29 percent of respondents strongly or somewhat supported such taxes. It also found that few Americans have a solid opinion about cap and trade policies.