I wonder how many volcanos it would take to stop global warming, and bring us another Ice Age? Or worse. Global warming may be better than WHAT could happen. We are only one big volcano away from a catastrophe, that could easily take us petty humans out. I think we need to worry about volcanos more than fossil fuels creating CO2. Although in both cases, it is a waste of time to worry. Not much that we can, or will do in either case. The political atmosphere isn't conducive to any action upon global warming. And volcanos are immune to human interference. We are like fleas on a dog, who are trying to save the dogs life. Chances are, that won't happen.