What's wrong with this picture? There'll be a short test at the end of this post There are many ways to reduce light pollution. One way is through regulation, just as we have laws about excessive noise or air pollution. Here are some of the things which other countries, regions or cities have done. Better Laws In 2002, the Czech Republic became the first country to pass laws about shielding of streetlights and to insist on flat rather than round glass, to prevent light spreading out in all directions. Solvenia introduced strong upper limits on lighting in 2007, exempting only those needed for security and safety. However, factories, airports, railways and ports may not use lighting which shines above the horizontal. A nice touch is the mention of endangered species. If there are nests on a building for example, that area may not be illuminated. In Italy a number of jurisdictions have enacted their own laws, but those which Lombardy introduced in 2009 are...
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