This is a better place for this thread.
1st, if the sea rises 200', it will flood thousands of square miles of low lying areas resulting in at most, a 30' rise with all ice melted and the water expanded due to heat. Disneyland is at about 130', I think it's safe. If not, we can always dig a trench and let Death Valley fill up.
2nd, CO2 does trap heat, humans are responsible for much of the CO2, thus humans do have an effect on the environment. Smog is also bad, oil makes us dependant on other countries and is running out. Why not make progress and develop other, far more nifty technologies regardless of how threatening we feel global warming is?
Denying global warming is like denying obesity. If you fix obesity you end up with a lot more hot chicks and food and airline prices drop. I really don't see why people get so antsy when facing problems that have such desirable solutions.