Headhunter, now reaching for his really big spoon...
The best thing we as humans can do to stop "global warming" is to drive vehicles that get no more than 1 mile to the gallon! Yes, one mile to the gallon... why.... because humans will not do anything to create a new source of renewable energy or truly increase the effectiveness of our current energy use until all the oil is gone! We have shown through history that necessity is the mother of invention and can anyone say that they feel that we, as a people have truly put our collective resources toward creating an alternative? I think not!
Yes, my solution is extreme and to some degree, tongue firmly planted in cheek, but I bet some of you can see the limited amount of logic used here.
HH