What do you think of not being buried in a casket?

I don’t want to be buried in a casket. Personally, I think its a huge waste of money, a perfectly good tree, and nutrients (me). We don’t need to be cutting down more trees and when I die I’d like to know that I’m going to decompose and rejoin the Earth and help some plant grow or something, not sit in a casket just chillin for eternity. Does this seem weird to people, am I the only one? How do I tell my parents this? Like seriously, put me a sack or something and lower me down…
Oh, I don’t really want to be cremated either. We don’t need to be burning more fuel just to get rid of me ;)