I was wondering which environmental jokes can help serve the environmentalists cause. I think they need to be particularly clever in the way they arouse a sense of fun, and at the same time push home a green message, without poking a whole lot of fun at us greenies. (Okay a bit of poking fun is okay. Maybe us greenies have to get better at the dramatic arts, and build up thicker skins!) One thing that can be said about a green joke, is that, at least the green message isn't intended to be altogether depressing! To be fair, it's not easy to make a one-liner about the environment hysterically funny.
A while back I posted a link to Alan Carr's video when he makes a joke about a chicken being so free range, she might as well be out having a make-over.
Anyway, here's Ask Umbra's take on this topic, which is well worth a read: some definitely cute green jokes there. I'm not sure whether the jokes are just meant to be generally for our benefit or serve a behaviour change purpose, or both, but I don't think it matters very much.