The Lie in response to the charge of lying

Union of Concerned Scientists, an independent organization of about 60 influential scientists, has released a report claiming the Bush administration "has deliberately and systematically distorted scientific fact in the service of policy goals on the environment, health, biomedical research and nuclear weaponry at home and abroad".

The White House's top spokesman, Scott McClellan, said Wednesday that he had not seen the text of the scientists' accusations. "But I can assure you that this is an administration that makes decisions based on the best available science," he said.

...[The scientists] accuse the administration of repeatedly censoring and suppressing reports by its own scientists, stacking advisory committees with unqualified political appointees, disbanding government panels that provide unwanted advice and refusing to seek any independent scientific expertise in some cases.

"Other administrations have, on occasion, engaged in such practices, but not so systematically nor on so wide a front," the statement from the scientists said, adding that they believed the administration had "misrepresented scientific knowledge and misled the public about the implications of its policies."  article

....but hey, do what you want....you will anyway.