We have no reason to think that climate change is harmful if you look at the world as a whole. Most places in fact are better off being warmer than being colder. And historically the really bad times for the environment and for people have been the cold periods rather than the warm periods.
Somewhere between 50 to 60 percent of the food you eat has been touched by immigrant hands and it is fair to say some of them are not here as they should be here. But if you didn't have these folks you would be spending a lot more - three four or five times more - for food or we would have to import food and have all the food security risks.