Regardless, we're still responsible for them at the time being. Yes, mother nature will fix herself, with or without the human race, but you have to think, we have to live in what we create until she says enough, and who knows how long that will be, or if the human race will have survived itself to see it. As excuseme said, destructive happenings started with small changes. Like, going off Friends example, if you see a very expensive glass sculpture, make the choice to view it from a distance or walk away, instead of changing your thought, then your movements, then your touch, and knocking off its pedestal or just breaking it. Remember, we're creating the future we have to live in..