Save the Night in Europe

   Light pollution is the alteration of natural light levels in the
   outdoor environment due to manmade light sources.

says Pierantonio in his introductory page, http://savethenight.eu/Home.html

I forgot to mention ``due to manmade light sources'' in my proofs within
your draft...  The above definition is better. And it comes from the main
authority. Use it instead, please. Glaring strong lamps pollute even in
daytime, when switched on.

jenik