Because all aspects of the earth are run by HUMANS, not God! God gave us a brain to use and the free will to use it as we see fit. Obviously, we've failed miserably in many areas. We can't get along with each other, we're greedy, which leads to corruption, we're immoral and we've been fed superstitious crap all of our lives that God is controlling all aspects of our lives. Nothing is farther from the truth. When people begin to realize that, then maybe we'll take control of our own lives and take better care of the earth that is under our guardianship.