George Carlin did a hilarious skit on this, paraphrased, he was mocking the save the earth folks, and said something like ...don't worry about the earth, it was fine before us and will be just fine long after we're gone....but what about all the plastic? Heck I don't know...maybe the earth likes plastic and that's why it let us get so numerous, because the earth wants to be decorated in plastic...and if the earth wants to get rid of all the plastic, it's got plenty of time to do it, and by the way, all the plastic came out of the earth! The earth is going to be here and it will be doing just fine long after we are gone, worry about the people, the people are the ones who need saving!