Its not that.

Basically, on the average, people don't have ability to think rationally into the future. Most people think only 1 level of cause and effect.

Right now, for the vast majority of people, global warming isn't a problem when your house has AC, your car has AC, your workplace has AC. When you are forced to do things that you see no direct effect of, it makes it seem less important, and its a self reinforcing cycle where you see other people not doing it and you wonder why you have to make your life harder.

People will start caring only when their direct lives are affected. So unfortunately, the only way to fix global warming is to let it get bad enough to where there is enough death and destruction for people to start paying attention.