PRINCETON, NJ -- Gallup's annual update on Americans' attitudes toward the environment shows a public that over the last two years has become less worried about the threat of global warming, less convinced that its effects are already happening, and more likely to believe that scientists themselves are uncertain about its occurrence. In response to one key question, 48% of Americans now believe that the seriousness of global warming is generally exaggerated, up from 41% in 2009 and 31% in 1997, when Gallup first asked the question.
 
These results are based on the annual Gallup Social Series Environment poll, conducted March 4-7 of this year. The survey results show that the reversal in Americans' concerns about global warming that began last year has continued in 2010 -- in some cases reverting to the levels recorded when Gallup began tracking global warming measures more than a decade ago.
 
For example, the percentage of Americans who now say reports of global warming are generally exaggerated is by a significant margin the highest such reading in the 13-year history of asking the question. In 1997, 31% said global warming's effects had been exaggerated; last year, 41% said the same, and this year the number is 48%.