How was this not already a thing? It seems like a huge marketing opportunity. I mean they theoretically they wouldn't even need to color some of them you could use clear and green clear to make bricks of that same shade.
I am happy they are doing it. It makes perfect sense... but 10 years too late imo.
RE: LEGO has just announced that they will release their first set of bricks made from "green plastic" later this year!