More to it than global warming, and btw, most scientists consider global warming a fact at this point, CO2 has risen to about 300parts per million, its undeniable. First and foremost threat facing us as humans is resource depletion, peak oil is here, thats an undeniable fact too. We've spent the last 100 years consuming like there's no end in sight, overshot population sustainability of the planet by a factor of 3-4, and nobody seems to notice or care. Collectively we humans are no smarter than yeast. Global warming true or not, is child's play compared to what resource depletion will do to us.