The reason that many Americans don't want to see that global warming is no hoax:

Acceptance of global warming theory means you accept that there?s a 500,000,000 year buildup of carbon in the ground, left by all those evolving plants and animals, and that digging much of it out and putting it into the air over a few hundred years makes a difference to a world created by a diety about 6,000 years ago.

The answer of a too religious bible belt inhabitant might be:
"How can that be true if the earth is 6,000 years old, and the coal and oil were put there for our use? "