Many organizations mostly in the nonprofit sphere are approaching the sustainability issue from various angles. As Paul Hawken indicates (see Thought Leaders 4 page) there are almost too many to count. I'll just list a few in the Seattle area and the piece of the sustainability pie they deal with. There is a need to integrate all these separate movements and agendas together.
Sustainable Seattle
www.sustainableseattle.org Environment & Community NorthWest Intentional Communities Association NICA
www.ic.org/nica Community Housing