This concept, like the entire contents of my website are in the Public Domain, so have at it if this appeals to you… It goes something like:

A group of funny “loser/slacker” terrorists accidentally triggers some secret government device which inadvertently fixes Global Warming. The wrinkle is that the government is forced to keep the whole thing under wraps, because revealing the details of it would make the government look dangerously inept and foolish - and during a tense election season.

And there would be a really cool chase scene, and the terrorists would always be eating Taco Bell, or maybe Jack in the Box or something.