election year tactics

from the new york times:
U.S. REPORT, IN SHIFT, TURNS FOCUS TO GREENHOUSE GASES
In a striking shift in the way the Bush administration has portrayed thescience of climate change, a new report to Congress focuses on federalresearch indicating that emissions of carbon dioxide and other heat-trapping gases are the only likely explanation for global warming over thelast three decades.

In delivering the report to Congress yesterday, an administration official,Dr. James R Mahoney, said it reflected "the best possible scientificinformation" on climate change. Previously, President Bush and otherofficials had emphasized uncertainties in understanding the causes andconsequences of warming as a reason for rejecting binding restrictions onheat-trapping gases.

we know this is all because bush is trying to get re-elected and he has proven himself to have no qualms about backing out of campaign promises.