Thats actually a good idea.
Then there'd be no one left able to repopulate the planet. The last humans would die out and the planet would be left to slowly rid itself of pollution and global warming. Endangered species could breed in peace. Animal, plant and insect life could re-establish itself and hold sway . . . until visitors from an alien planet arrive to decimate the land of all its clean water and nutrients and minerals and then blow the planet to Kingdom come.
Good solution, I like it.
