I read an article several months ago about the "green" funeral movement. If you think about it, when we bury the dead in a cemetery, we put a lot of stuff in the ground that is not good -- heavy metals, chemicals, treated wood products, etc.
I tried to find a link to the article (it was in Audubon Magazine), but I can't locate it. Here is a good link, though, to an organization that espouses "green" funerals.
http://www.greenburialcouncil.org/
As for me, personally, I have to admit I haven't given much thought to it. I am a very much a "day at a time" type of person. I do know I'm not big on a church thing. I'd just rather it be some sort of non-denominational memorial type thing with a nice party afterward.