By Richard Cowan
Washington - A growing number of Americans, nearly half the country, think global warming worries are exaggerated, as more people also doubt that scientific warnings of severe environmental fallout will ever occur, according to a new Gallup poll.
The new doubts come as President Barack Obama is pressuring the Congress to produce legislation significantly cutting smokestack emissions of carbon dioxide and other greenhouse gases blamed for climate change problems.
With congressional elections less than eight months away, many lawmakers are hesitant to take on a controversial energy and environment bill, especially if voter interest is waning.
Amid eroding public sentiment and in response to escalating attacks from global warming sceptics, the Union of Concerned Scientists on Thursday released a letter they said was signed by more than 2 000 climate scientists and economists, including some Nobel prize winners, urging the Senate to pass a bill.
"The strength of the science on climate change compels us to warn the nation about the growing risk of irreversible consequences ... as temperatures rise further, the scope and severity of global warming impacts will continue to accelerate," they wrote.
The Gallup poll, conducted March 4-7, indicates a reversal in public sentiment on an issue that not only involves the environment, but also economic and national security concerns.
Forty-eight percent of Americans now believe that the seriousness of global warming is exaggerated, up from 41 percent last year and 31 percent in 1997, when Gallup first asked the question.
The result comes on the heels of well-publicised reports that some of the details of scientific findings that went into international global warming reports were either flawed or exaggerated.
But supporters of an aggressive global effort to keep the Earth's temperatures from rising more than two degrees Celsius from pre-industrial levels argue that while scientists need to be more fastidious in their research, the overwhelming evidence supports the theory that a warming planet will lead to dangerous ice melting, flooding, drought, refugee problems and the spread of disease.
The United States has made a non-binding pledge to the world to seek a 17 percent reduction in carbon emissions by 2020, from 2005 levels, mostly by switching to more expensive alternative energy, such as wind and solar power.
But without legislation from Congress, that goal is unlikely to be met. - Reuters