The uncertainty that encouraged the "wait and see" policies of the United States and other countries is quickly evaporating as time to mitigate the heating runs short.
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"We know that the surface of the Earth is getting warmer, and that an increase in greenhouse gases caused by humans is contributing to the problem," according to a White House fact sheet dated July 1 and titled "President Bush Is Addressing Climate Change." At best, the climate is entering a natural and lethal fluctuation in temperature, scientists said.
Or, the burning of coal, oil and gas that lofts 7 billion tons of carbon into the troposphere every year could be to blame. Regardless, the ominous effects of a warming world are becoming as clear as the melt water from Greenland’s ice sheet, geologists said. Scientists say that when seas rise 30 feet, perpetual winter descends on Europe and vast areas become too arid to cultivate in 2200 or later, it won’t matter what made the planet’s surface warmer. And that could be exactly where we’re headed unless dramatic steps are taken now to curb carbon dioxide and other heat-absorbing gases, earth scien-tists, geologists, meteorologists and environmental researchers say.
"We’re going to see a continuing outpouring of really frightening information about the situation. It will continue more and more," said James Gustave Speth, dean of the Yale School of Forestry and Envi-ronmental Studies. "No matter what we do now, we’ll change the climate in a variety of very unpleasant ways," he said. If the world somehow stopped producing carbon dioxide immediately, warming would continue through the next century at the same rate as in the 20th century, Speth and other experts said. Virtually all scientists agree that the average surface temperature is rising about 1 degree Fahrenheit a century.
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http://www.nhregister.com/site/news.cfm?newsid=14953128&BRD=1281&PAG=461&dept_id=517515&rfi=6