Making the virtual real
NEC's ecotonoha project is interesting in how it mixes the virtual with the real world. Everyday a new "tree" is setup and people leave messages as "leaves" on the tree. For every 100 "leaves" added to the virtual tree, a real tree is planted on Kangaroo Island in South Australia.
There is plenty of armchair activism to be found online, but it's rare when anything real comes of it, and this looks like a cool reforestation project that uses the web to fuel it.