This week NRDC OnEarth magazine senior editor Laura Wright and journalist Lisa Selin Davis bring us environmental activism in virtual space, or if you prefer, Massive. Multiplayer. Online. Roleplaying. Games. Got it? OK. But whereas most games of this sort allow you to behave violently in the most unthinkably violent civilizations, Second Life houses virtual ecosystems, clean water systems, and visions of post-global warming tragedy. While it is  a virtual pastime in a world of rather concrete problems, Second Life offers the opportunity to envision many of the various futures still available to us. LISTEN (7 min)