Light Pollution
Light pollution is an ever increasing source of sky brightness in urbanized areas. In densely populated areas that don't have stringent light pollution control the entire night sky is regularly 5 to 50 times brighter than it would be if all lights were switched off, and very often the influence of light pollution is far greater than natural sources (including moonlight). This article is about natural sky brightness, for more information about light pollution please visit the light pollution article.
Read more about this topic: Sky Brightness
Famous quotes containing the words light and/or pollution:
“Not every light is a true light;
To the wise the light of truth is light itself.”
—Tiruvalluvar (c. 5th century A.D.)
“Like the effects of industrial pollution ... the AIDS crisis is evidence of a world in which nothing important is regional, local, limited; in which everything that can circulate does, and every problem is, or is destined to become, worldwide.”
—Susan Sontag (b. 1933)