A front group for Big Oil is putting out ads denying the reality of global warming, in a pre-emptive bid to undermine Al Gore's new documentary, An Inconvenient Truth.

The first ad portrays global warming science as a vicious smear campaign against carbon dioxide. The ad, which despite appearances is not an SNL parody, helpfully reminds us that carbon dioxide is “essential to life” because “we breath[e] it out.”

"An Inconvenient Truth" opens in Seattle on June 2nd, 2006.