[bluGill]

Not everybody flees from dry areas though. There are always a few people who love the area enough and stay behind trying to make a living. If they have the opportunity (mostly a combination of legal rights, knowledge, but there are a bunch of other factors not all of which I will claim to know) to make their part of the desert better, the total of all those small changes is a big thing.

My personal use of coal/oil (including indirect use in the products I buy) is insignificant to global warming. However across the population of the world...