From the NY Times:
"White House Shifts Its Focus on Climate
By ANDREW C. REVKIN
Published: August 26, 2004
n a striking shift in the way the Bush administration has portrayed the science of climate change, a new report to Congress focuses on federal research indicating that emissions of carbon dioxide and other heat-trapping gases are the only likely explanation for global warming over the last three decades.
In delivering the report to Congress yesterday, an administration official, Dr. James R Mahoney, said it reflected "the best possible scientific information" on climate change. Previously, President Bush and other officials had emphasized uncertainties in understanding the causes and consequences of warming as a reason for rejecting binding restrictions on heat-trapping gases...
...American and international panels of experts concluded as early as 2001 that smokestack and tailpipe discharges of heat-trapping gases were the most likely cause of recent global warming. But the White House had disputed those conclusions.
The last time the administration issued a document suggesting that global warming had a human cause and posed big risks was in June 2002, in a submission to the United Nations under a climate treaty. President Bush distanced himself from it, saying it was something "put out by the bureaucracy."
That may be harder to do this time..."
http://www.nytimes.com/2004/08/26/science/26climate.html?hp