SAGE Reference - Green Cities: An A-to-Z Guide

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Light Pollution

By: Jonathan Parker
In: Green Cities: An A-to-Z Guide
Edited by: Nevin Cohen & Paul Robbins
Subject:Urban Planning
Keywords:circadian rhythm; pollution; pollution: air and water; sea turtles; seas; species; stars

One-fifth of the world's population cannot see the Milky Way at night because of so-called sky glow. This NASA composite image of Earth at night shows particularly impacted areas like Europe, Japan, and North America

Source: Image by Craig Mayhew and Robert Simmon/NASA GSFC

Light pollution generally refers to human-designed, artificial lighting that illuminates areas other than those the light was designed to illuminate. A classic example of light pollution would be a streetlight that is constructed to illuminate a sidewalk or street to allow walkers and motorists to travel with greater ease and safety at night. Depending on the design and construction of the light fixture, the light can either be directed directly to the ground beneath it or, alternatively, can release light in every direction. ...

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  Parker, J. (2011). Light pollution. In N. Cohen, & P. Robbins (Eds.), Green cities: An A-to-Z guide (pp. 298-300). SAGE Publications, Inc., https://www.doi.org/10.4135/9781412973816.n93
  
  Parker, J. (2011). Light pollution. In N. Cohen, & P. Robbins (Eds.), Green cities: An A-to-Z guide (pp. 298-300). SAGE Publications, Inc., https://www.doi.org/10.4135/9781412973816.n93
  
  Parker, J. (2011). Light pollution. In N. Cohen, & P. Robbins (Eds.), Green cities: An A-to-Z guide (pp. 298-300). SAGE Publications, Inc., https://www.doi.org/10.4135/9781412973816.n93
  
  Parker, J. (2011). Light pollution. In N. Cohen, & P. Robbins (Eds.), Green cities: An A-to-Z guide (pp. 298-300). SAGE Publications, Inc., https://www.doi.org/10.4135/9781412973816.n93
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Light Pollution

One-fifth of the world's population cannot see the Milky Way at night because of so-called sky glow. This NASA composite image of Earth at night shows particularly impacted areas like Europe, Japan, and North America

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