Grist: Location, location, location the realtors mantra holds true, even in this virtual age. And right now, this weekend, the white-hot center of the environmental world is Seattle, Wash., because it sits on some of the most crucial real estate on planet earth. Seattle has long had a strong green tradition (why else would Grist make its home there?). It grew, perhaps, from the fierce attachment to the remarkable natural beauty of Puget Sound, of Mt. Rainier looming over the skyline. In any event, world-class...