Not too many posting slots left, so here goes.
This will be from the gut, as I don't have any supporting links and references at this time...
Global warming preventable? NO. The horse is out of the barn. In case you haven't noticed, the Indians (India) and Chinese want what the Americans and Europeans want. And we're going to tell them NO? Hardly!
Coastal populations will relocate by walking. What mankind has done for eons. The question remains as to whose property they'll relocate to.
Wars? There will always be wars. Period. Over available water, arable land, nukes, oil...you name it. War is good for the military-industrial complex, don't 'cha know. The Americans didn't learn squat from the Vietnam debacle, now did they?
Can humanity maintain the U.S. standrad of living? Nope. The haves will continue to have, and the have nots will go hungry. But wars will not be used as a way out. The haves will gladly give to the have nots if they can be seen as "do-gooders" to build their self-esteem and global social standing. Good will is a tradable commodity, also.
Who knows, the "Great Unwashed" may become trading partners. They can assemble beads and trinkets for $1 a day.
I firmly believe that the whole "climate change" schtick will be a generational thing. In other words, no one human generation is going to get hit with the whole good and bad. You will hold your grand children on your knee and tell them about the time there were actual glaciers in Alaska and pine forests in the American Southwest that hadn't burned to the ground. And they will tell you about their reality of Carnaval Cruise ships in the Artic, apple orchards in Siberia, and the Great Florida Reef that used to be a state in the U.S.
(:raig