WASHINGTON - According to the Pew Research Center for the People and the Press, Americans are cooling on the topic of global warming.
Last week's poll results, which didn't get much play in Vermont, may indicate what one pollster says is growing "green fatigue".
Falling 20 points in three years, according to Pew, just 57 percent of Americans now believe there is solid evidence for global warming.
The number of Americans believe that human-induced pollution is to blame for climate change is also falling.
The Pew poll included 1,500 adults with varying backgrounds.
The new poll shows that the number of people claiming that the planet Earth has warmed in recent decades is down-from 77 percent in 2006 to 71 percent in April 2008.
Some experts are blaming the poll results on the bad economy and on Americans' change of focus, but others point to the "green fatigue" factor.