Still Unclear on the Concept

An electric vehicle runs without burning gas, and emits nothing but water vapor as exhaust.

I thought water vapor was the greatest cause of global warming?

And what chucklehead thought that a car that spews more humidity would be a big winner, especially in the summer? I guess as long as I'm inside my Prius running the freon-seeping air conditioner, the rest of you planet rapists can just kiss my ass.