It's not global warming I am worried about, it is the increasing cost of extraction driving increasing cost of food production and limiting expansion, and in the face of technology that could totally eliminate these concerns. We will never get anywhere near the alleged global warming figured projected because of the simple fact that we've already extracted all the easy to get at fossil fuels and those that remain are becoming increasingly expensive. So it isn't a couple degrees of warmth or someone's beach house that concerns me, its' being able to eat.