I guess I should have mentioned "carbon credits". That's going to be built into the revenue model.
While I think the whole concept of carbon credits is rather stupid, if a government wants to give me money to sequester carbon then I am going to take it. I mean, they steal from me every year in taxes so why not?
I'm not saying this will actually work but this design will not get out of my head so I figure the only way to force it to stop haunting me is to build the entire model.