There are evil things happening in the world because we, humans have turned away from the ways of God. God created for us a good world. The Bible says that when God was creating, each day he saw what he had created that they were good. When he was done creating the universe, he observed that everything he had made was very good. So, God gave us a very good world. We are those who turned around and polluted the world. We are those who messed up the good work of God. When you make a mess from what you have, you will certainly have problems from that.
How can we solve the problems which we have created for ourselves? We must return back to God. There is one other way to handle the issue for us to return back to God. God promised the Israelites that he will heal their land if they repent and turn from their sins. We ourselves must do the same so that God can heal our nations. The more we harden our hearts and reject the laws of God, the more we will suffer from several afflictions. It is not the will of God that we should suffer. We are suffering because we have neglected the ways of God.