Hmm... yes, it's a joke.
But it reminds me of the kind of thing our actual Texas governor/presidential candidate would say about global warming. I often get the sense that many conservatives actually don't care if global warming is caused by man. They say they don't believe it, but honestly, even if they did, I don't think they would change their actions. They just don't give a ... shhh.
Note: This video contains lots of swears! So don't blast the volume if you are at work. Especially if you work at a daycare.