There are several things that will change if global warming is left unchecked. First of all, the icecaps that are at our northern and southern extremes will continue to melt at an alarming rate until they are all gone. I know this is difficult to believe, but there are organisms that actually live in that harsh, frozen environment, that are dependent on it, and call it home. Organisms like polar bears, penguins, seals, walruses, and the like. So their home will be destroyed, and extinction will be around the corner, since no natural cold biome exists anymore. The next thing to consider is the global rise in ocean levels; what is now beaches and oceanfront property will all be underwater. The entire state of Florida will be underwater, since the highest point above sea level is about 400 feet. So a lot of people will have to relocate, and there will be less land for them to relocate to. Our energy usage will continue to escalate; summers will be much hotter, winters will be much milder. The insect population will explode, since there isn't much of a cold season to keep them in check. Given all this and more, maybe we should get a grip on how much global warming we as a species are creating.