SHARP DECLINE IN NUMBER OF AMERICANS WHO SEE GLOBAL TEMPS RISING

Pew Research Center - There has been a sharp decline over the past year in the percentage of Americans who say there is solid evidence that global temperatures are rising. And fewer also see global warming as a very serious problem – 35% say that today, down from 44% in April 2008.

The latest national survey by the Pew Research Center finds that 57% think there is solid evidence that the average temperature on earth has been getting warmer over the past few decades. In April 2008, 71% said there was solid evidence of rising global temperatures.

Over the same period, there has been a comparable decline in the proportion of Americans who say global temperatures are rising as a result of human activity, such as burning fossil fuels. Just 36% say that currently, down from 47% last year.

The decline in the belief in solid evidence of global warming has come across the political spectrum, but has been particularly pronounced among independents. Just 53% of independents now see solid evidence of global warming, compared with 75% who did so in April 2008. Republicans, who already were highly skeptical of the evidence of global warming, have become even more so: just 35% of Republicans now see solid evidence of rising global temperatures, down from 49% in 2008 and 62% in 2007. Fewer Democrats also express this view – 75% today compared with 83% last year.

Despite the growing public skepticism about global warming, the survey finds more support than opposition for a policy to set limits on carbon emissions. Half of Americans favor setting limits on carbon emissions and making companies pay for their emissions, even if this may lead to higher energy prices; 39% oppose imposing limits on carbon emissions under these circumstances.

A majority (53%) of independents say there is solid evidence of warming, including 33% who say it is mostly caused by human activity. But this is far lower than in April 2008 when 75% said global warming was happening and 50% said it was due to human activity.

The proportion of Republicans saying there is solid evidence of global warming declined from 62% in 2007 to 49% in 2008. The balance of opinion among Republicans has shifted, with a majority (57%) now saying there is no hard evidence of global warming. The drop among moderate and liberal Republicans has been particularly steep; 41% now say there is solid evidence of global warming, compared with 69% last year. The decline among conservative Republicans has been more modest (from 43% to 32%).

There has been less change in opinions among Democrats. Three-quarters of Democrats (75%) say there is solid evidence the earth is warming, including 50% who say that it is mostly because of human activity. In April 2008, 83% of Democrats said the earth is warming and 58% attributed it to human actions. More liberal Democrats than conservative and moderate Democrats say the earth is warming (83% vs. 72%), and far more liberal Democrats say that global warming is caused by human activity (69% vs. 43%).

There also are strong regional differences in opinions about global warming; fewer people living in the Mountain West (44%) and the Midwest (48%) say there is solid evidence of warming than in other regions. Similarly, there have been sharp declines since April 2008 in the proportion who say the earth is warming in the Mountain West (75% to 44%) and the Great Lakes region (69% to 49%). Both regions have also seen large drops in the percentage who say that warming is caused by human activity. (For a breakdown of states and regions, see About the Survey, pg. 10.) Fewer See Warming as Very Serious Problem

A majority (65%) of the public continues to view global warming as a very (35%) or somewhat (30%) serious problem. But in April 2008, 73% expressed this view, including 44% who thought it was a very serious problem.