I've recently changed my mind about what I want done with my remains after death. I had wanted cremation because I think it's selfish to take up land after death. But I've had a better idea that won't pollute the air:
I want to be dropped in the ocean, far enough out that I won't wash up on land. I want to sink to the bottom and fuel life for all the strange scavenger critters that dwell on the ocean floor. Other than the fuel for the boat, this is as close to 100%-efficient recycling as I can imagine.
I haven't looked into how one would make arrangements for this to happen without putting the people dumping me in the water at risk of being charged with a crime (desecration of a corpse, illegal dumping, whatever). If I live long enough, I'll get around to researching whether I can make this happen.