1: I thought global warming was due to the global decrease in pirates?
http://www.venganza.org/piratesarecool4.jpg
2: The Earth is bound to get warmer over time, surely. After all, lots of energy is being sucked up and stored by plants all the time. That energy might get locked up in fossil fuels for a few million years, or it might get turned into heat by the animals that eat the plants, but how much of it ever escapes the Earth's atmosphere? We should be digging up coal and blasting it into space...
That doesn't mean I don't believe in man-made global warming mind you, just that in the grand scale of things the total amount of energy within the earth's atmosphere is bound to rise and rise.
3: The human race is perfectly capable of extincting itself through its own short-sightedness. As long as people put their own short-term comfort over longer-term goals that benefit everyone, there is nothing to stop us disappearing up our own emissions forever. Sure, hydrogen cars and solar panels and whatnot are available, but the truth is they'd be the norm rather than the niche by now if it weren't for certain industries protecting their own interests at the expense of the environment. What's more, you can be sure that if not for the campaigning of environmentalists, those technologies would never have gotten as far as they have.