There are many reasons hundreds of thousands of migrants are making the dangerous trek from Central America — and even farther away — to get to our southern border.
And, according to The Show's guest, one of them is climate change.
Todd Miller is based in Tucson and is the author of the book " Storming the Wall: Climate Change, Migration and Homeland Security."
He said climate change is making it impossible for many people around the world not to move.
