Current levels of greenhouse gases in the atmosphere are higher than at any time in the past 650,000 years, say researchers who have finished cataloguing air bubbles trapped for millennia inside Antarctic ice. The record, which extends back over the past eight ice ages, shows that today's concentrations of carbon dioxide and methane far outstrip those in the past.
Atmospheric carbon dioxide levels have risen 200 times faster over the past 50 years than at any other time during this period, says Thomas Stocker of the University of Bern, Switzerland, who led the analysis.
Today the Bush administration has finally come around to the side of environmentalists who have been sounding the alarm of global warming for some time. "We will put forth a bill to limit the growth of plants and flowers in greenhouses," said the President, who is spending time with his family at his ranch in Crawford, Texas.
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