If a country like Bangladesh goes under water in the next 30 years because of rising sea levels, there are 160-odd million people there, many of them poorly educated, who will be refugees. If it was only the Bangladesh country that went under water, maybe we could deal with it, but we could have a billion people on the run within the next 30 years. Where are we going to put a billion people? The U.S. is having trouble with 11 million illegal refugees, immigrants. What are we going to do when there’s a billion of them? Where are we going to feed those sort of people when much of the rice-growing areas of lowland might disappear? The implications of what is coming are enormous, and most leadership is not addressing it outside the framework of their own elected terms.