What's the Big Deal about Global Warming?

So here's my point... so what if global warming is real? The seas rise a little and the coast moves back a few miles. People can relocate. More people die from cold weather every year anyway, so a little warmer temperatures would be good for us. For every planet or animal that goes extinct, another will appear in it's place or thrive in the new environment. And let's face it, the world has been through so much worse - from ice ages, asteroid impacts, super volcanos, etc... somehow the Earth has managed to survive. And how cool would it be to go surfing in December? :D