So - think - you really prefer to keep immigrants in overheating floodable crowded cities - ghettoes ? By the way, I am myself an immigrant, I now live in a village, and do struggle. I also studied climate science and demography and technology trends, so I think about the longer term - places people struggled to live in the past, and the future, are not the same. We should use our knowledge to help those who move gain a better life than otherwise.