The first is taking place in Chicago at the end of May.
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.]
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