As Boonex is a community software expert so their way to green can be with a community software but a special one. I think it would be worth to create a green life portal (similar to second life). Residents of this land would be able to to interact with each other through avatars. Residents can explore, meet other residents, socialize, participate in individual and group activities which encourages living in a better greener and sustainable world.
This would inculcate the the thoughts in users see more towards environmental protection and conservation.