Solar housewarmings this weekend

Put on a green sunvisor and prepare to envy your neighbor's house this Sat. Oct. 1. It's National Solar Tour Day, organized by the American Solar Energy Society. There are solar tours in most states, lots of course in Northern California and Florida. Absent from the list are some big cities--Chicago, Detroit, and Miami--as well as the Dakota states, Wyoming, Nebraska, Oklahoma, Alaska, and Mississippi. But the show's still going on in Louisiana.