WASHINGTON — Americans seem to be cooling toward global warming.
Just 57 percent think there is solid evidence the world is getting warmer, down 20 points in just three years, a new poll says. And the share of people who believe pollution caused by humans is causing temperatures to rise also has taken a dip, even as the U.S. and world forums gear up for possible action against climate change.
In a poll of 1,500 adults by the Pew Research Center for the People & the Press, released Thursday, the number of people saying there is strong scientific evidence that the Earth has gotten warmer over the past few decades is down from 71 percent in April of last year and from 77 percent when Pew started asking the question in 2006. The number of people who see the situation as a serious problem also has declined.
The steepest drop has occurred during the past year, as Congress and the Obama administration have taken steps to control heat-trapping emissions for the first time and international negotiations for a new treaty to slow global warming have been underway. At the same time, there has been mounting scientific evidence of climate change — from melting ice caps to the world’s oceans hitting the highest monthly recorded temperatures this summer.
The poll was released a day after 18 scientific organizations wrote Congress to reaffirm the consensus behind global warming. A federal government report Thursday found that global warming is upsetting the Arctic’s thermostat.
Only 36 percent of the respondents believe that human activities — such as pollution from power plants, factories and automobiles — are behind a temperature increase. That’s down from 47 percent from 2006 through last year’s poll.
“The priority that people give to pollution and environmental concerns and a whole host of other issues is down because of the economy and because of the focus on other things,” suggested Andrew Kohut, the director of the research center, which conducted the poll from Sept. 30 to Oct. 4. “When the focus is on other things, people forget and see these issues as less grave.”
While three-quarters of Democrats believe the evidence of a warming planet is solid, and nearly half believe the problem is serious, far fewer conservative and moderate Democrats see the problem as grave. Fifty- seven percent of Republicans say there is no solid evidence of global warming, up from 31 percent in early 2007.
