The world is not just given to us by our Fathers, it is also borrowed from our Children. Would you cheat your Children? I thought not, I want to keep "our" World as nice as I can for my Children and Grandchildren. And hey, Grandchildren, that applies to you too! One day you will have Children and Grandchildren, make sure you leave the World in at least as good a condition as you found it. Start NOW!
Hows this for a thought - if you make the World better in one way, you make it better in every way. I bet you can think of a way to make the World better. Now all you have to do is do it!