Some people are. There's a thing called green burials. The body isn't preserved, just put in a shroud kinda thing that helps decomposition I think, and buried like that.

There's also companies that will take your cremated ashes and put them into a planter with a sapling, so you can plant it and grow a tree. Or if you wanna get really weird I've seen ones that turn your ashes into a vinyl record haha.