What can I do in Second Life?

Offset your avatar

http://www.carboncatalog.org/blog/2008/04/12/offset-avatar/

The Big Green Switch links avatar energy costs to tree planting

See video at http://www.shinyshiny.tv/2008/03/offset_the_carb.html

Or paying to join Green Islands Project group
http://www.greenkeyrealestate.com/corporate/tiffanyelston/virtual-world-promotes-sustainable-living

And of course by joining up to the Rings Discussions group or subscribe to Imagine Network through a visit to our HQ in Four Bridges, taking part in Earth Week, visiting all the environmental sims taking part and inviting all your friends!