Pumping water vapor into the atmosphere does not increase the greenhouse effect. The air becomes saturated, and the excess water falls out as rain.

See, that dystopian future just won't happen. We're not going to just wake up one day and find that there's no coal left in the ground, and whoopsie, we can't power the world anymore! It's an asymptote, not a brick wall. Coal reserves are going to disappear slowly, and new coal will be harder to find and more expensive to mine. So the price of coal will rise, gradually. And just as gradually, people will start getting power from sources that used to be more expensive than coal, but aren't anymore since the price of coal went up. We're watching that happen right now: coal prices are going up and natural gas prices are going down, and the big players are shifting from one to the other.

We'll all end up on renewable tech eventually, as fossil fuels become more expensive through dwindling supply. The point is that we should work so that "eventually" becomes "soon", for reasons of pollution and climate change. It's not because we're going to run out.

Um, yes. For all of his congregation, anyway. That's why you have a publicized debate in the first place.

He's your father, and he will likely die before you do. You let him hold his beliefs, and you just keep him from imparting them on your children.

It gives them a bit of credibility that Nye is doing this in the first place, yes. But creationism already has credibility among many in the American public. Ham has to keep that going through the debate. If he comes off as ranting or raving, then he will lose much of that credibility.

Many creationists (not all, of course) that I've met have been, in most other respects, smart and rational people. They were simply taught from a young age that their worldview was right, and that any evidence to the contrary was unsupported handwaving. To have a man like Nye come in and show them that evolution is actually backed up by science could actually have an effect. It will at least plant the seed of doubt in a few heads.

Call me naive, call me an optimist, whatever. But I don't think the small credibility boost that Ham is getting is too high a price for the possibility of changing a few minds.

I'm not so sure about that one...

No, that's a relative clause, not a full sentence. "that don't need to be on the plane" serves only as an adjective for "snakes".

The independent sentence, without the relative clause, is "Finally, snakes." The primary verb is implied: "Finally, [there are] snakes." Or maybe "Finally, [we have] snakes." Or something similar.