If you have heard of the website IFL Science, you will know that it is full of amazing and bizarre facts about life, the universe, and our place in both. This article from a while back caught my attention.
Basically, it runs through all of the ways you can be disposed of on your death in an environmentally friendly way. You can have a decomposable coffin or an infinity burial suit that has mushroom spores built into it to speed your decomposition; you can have a biodegradable urn, or have your body turned into a coral reef or a diamond; or you could have your ashes launched into space. The possibilities are, it seems, endless.
Check out the article for all of the options.