Japan. Their technological advances are critical to saving the world, whereas... Africa provides little of that and frankly has a lot of problems that require a lot of solving, to be honest. Plus with all the developing countries down there, the emissions being stopped would help if anything. Plus, we do have that whole global overpopulation thing, so... >_>
--
http://www.nbc.com/parks-and-recreation/exclusives/ron-dancing-animated.gif