Three out of four Americans believe that the Earth has been gradually warming as the result of human activity and want the government to institute regulations to stop it, according to a new survey by researchers at the Woods Institute for the Environment at Stanford University.
The survey was conducted by Woods Institute Senior Fellow Jon Krosnick, a professor of communication and of political science at Stanford, with funding from the National Science Foundation. The results are based on telephone interviews conducted from June 1-7 with 1,000 randomly selected American adults.
"Several national surveys released during the last eight months have been interpreted as showing that fewer and fewer Americans believe that climate change is real, human-caused and threatening to people," Krosnick said. "But our new survey shows just the opposite."
For example, when respondents in the June 2010 survey were asked if the Earth's temperature probably had been heating up over the last 100 years, 74 percent said yes. And 75 percent said that human behavior was substantially responsible for any warming that has occurred. Krosnick has asked similar questions in previous Woods Institute polls since 2006.
"Our surveys reveal a small decline in the proportion of people who believe global warming has been happening, from 84 percent in 2007 to 74 percent today," Krosnick said. "Statistical analysis of our data revealed that this decline is attributable to perceptions of recent weather changes by the minority of Americans who have been skeptical about climate scientists."
In terms of average Earth temperature, 2008 was the coldest year since 2000, Krosnick said. "Scientists say that such year-to-year fluctuations are uninformative, and people who trust scientists therefore ignore this information when forming opinions about global warming's existence," he added. "But people who do not trust climate scientists base their conclusions on th
|Contact: Mark Shwartz|