you can't let your car sit and run in the garage, no matter how big the garage. Surely there is some validity to global warming. It's a closed system, it will reach the "full" point sometime. More and more people and more cars and factory jobs and eventually we live in a stinking fog. Or where does all this crap go then? It just 'goes away'? I'm not sure how much global warming i believe but the only way i think of it is that you cant let your car run inside, or you'll choke eventually. I suppose acid rain helps get rid of some idk