Human migration is, by far, the worst thing that will ever happen to this planet environmentally.
Simple fact, humans pollute. The more humans on this planet and the worse the environment will be for everybody.
How did we get to the point where liberals all over the world have changed their views to support this? There's a push to move all of the people from the poor and highly populated areas into areas where population has evened out. This will have the effect of a population explosion, and the planet will be the worse for ware.
The only thing see people pushing to help the environment these days is raising taxes to "combat climate change". Forgive me if I'm skeptical that me giving the government more of my money is somehow going to help, because so far it hasn't.
So what's the plan? Because this open borders and high tax thing doesn't seem like it's doing much good overall.