Man Made Global Warming

The question mark is gone for good, according to a world body studying all the scientific data and reports from around the globe on climate and global warming: We have been the cause of the warming over the last 50 years. And we are on the brink of an irreversible trend that could continue for the next 1000 years.

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The world's top climate scientists said on Friday global warming was man-made, spurring calls for urgent government action to prevent severe and irreversible damage from rising temperatures.

The United Nations panel, which groups 2,500 scientists from more than 130 nations, predicted more droughts, heatwaves, rains and a slow gain in sea levels that could last for more than 1,000 years.

The scientists said it was "very likely" -- or more than 90 percent probable -- that human activities led by burning fossil fuels explained most of the warming in the past 50 years.

That is a toughening from the Intergovernmental Panel on Climate Change's (IPCC) last report in 2001, which judged a link as "likely," or 66 percent probable.

Possible signs range from drought in Australia to record high winter temperatures in Europe.

"February 2, 2007 may be remembered as the day the question mark was removed from whether (people) are to blame for climate change," said Achim Steiner, head of the U.N. Environment Program.

"Faced with this emergency, now is not the time for half measures. It is the time for a revolution, in the true sense of the term," French
President Jacques Chirac said. "We are in truth on the historical doorstep of the irreversible."