There's lots going on up there! NY times piece on green roofs in Japan. Booming in Germany. Makes me all the more proud of our rooftop vegetable farm -- and eventually, rooftop solar greenhouse -- at Institute for Local Self-Reliance, just a stone's or tomato's or cucumber's throw from the White House back in the early 70s. Hey, we wuz even the Plowboy Interview!
[I'm rifling the garage looking for embarrassing ancient photos.]