The International Dark Sky Association seeks to eliminate all unnecessary night lighting worldwide.  Originally their motive was “light pollution.”  Now it’s also a horrific waste of energy.  A third of all night is wasted, in not being focused or concentrated on the objective surface(s).  The U.S. along wastes $3 billion each year on diffuse lighting – ten times that much if all the lights were turned out, like they do in Tucson, Arizona.  Why can’t every major city follow suit?  Why can’t there be a federal law?  How bad is it?  Here’s a map of the U.S. at night.  Scientists on the International Space Station circle the earth once every 90 minutes; as pro-active as NASA is in environmental issues, how come they’re blind to all the wasted night energy they see, day in and day out?