The Economist Blog Babbage notes a problem that we don't have here in Edge City
"The term “light pollution” is not, it seems, a metaphor. The light that emanates from cities all over the world not only deprives their citizens of the pleasure of seeing the Milky Way on a moonless night, it also diminishes the freshness of the air they breathe at dawn. It interferes, says Harald Stark of American’s National Oceanic and Atmospheric Administration (NOAA), with the chemicals that mop up nasty molecules that are the raw materials of smog."
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