Think of the earth as a living organism that is being attacked by billions of bacteria whose numbers double every forty years. Either the host dies, or the virus dies, or both die.
You know, it's ironic to me that Christians want to keep the Ten Commandments in our schools, because Christianity has abrogated four of the Ten Commandments. For example, the Sabbath day according to the Ten Commandments is Saturday, not Sunday. And the reason is because God rested, not because Jesus was resurrected.