According to this PIPA report, 83% of Americans support the Climate Stewardship Act. Sen. Mark Dayton (D-MN) is a co-sponsor, Sen. Smilin' Norm Coleman (R-MN) is not. The bill is before the Senate's Committee on Environment and Public Works.
68% of Americans would support the bill, which aims to reduce greenhouse gas emissions (water vapor, carbon dioxide, and ozone) to 2000 levels by 2010 and to 1990 levels by 2020, even assuming an average household would pay an extra $15 a month in energy bills.
PIPA always manages to highlight how wrong Republicans are about basic facts. This time, the ignorance cuts both ways, though Republicans get the worst of it. Only 36% of Republicans know that President Bush opposes the Kyoto Treaty, but 54% of Democrats possess this knowledge.
The best news in the report, though, is the growing awareness of the scientific consensus that climate change is going on right now and human activity is accelerating the process. According to a September, 1994 study, 58% of Americans thought there was no such consensus. By June, 2004, 50% of Americans thought there was no such consensus. Now, however, only 39% of Americans think there's no such consensus.
For those wondering, yes, Virginia, there is a global consensus on climate change: at least according to the national academies of science for the G8 counties, plus China, India, and Brazil.