Michael Graham Richard, Ottawa, Canadahttp://www.treehugger.com/files/2010/03/san-francisco-first-city-in-usa-to-count-parking-spaces.php Photo: Flickr, CC "In San Francisco, housing is expensive for people but free for most cars." It might come as a surprise to some, but pretty much all cities in the U.S. (and the world) have only a vaguest...