light pollution 是神马意思

Light pollution is the result of wasted energy.Bright light that shines into the sky is not being used to provide light where it is needed on Earth.Poorly designed lighting causes a great deal of light pollution.Lights that are brighter than necessary also cause light pollution.Recently,two Italian (8)astronomers and an American (9)environmental scientist created a world map of the night sky.The map shows that North America,Western Europe and Japan have the greatest amount of light pollution.Most people in America are surprised to find out that they are able to see our own (10)galaxy,The (11)Milky Way,with their own eyes.But about three-fourths of Americans cannot see the Milky Way because of man-made light.Objects in the night sky are resources that provide everyone with wonder.But light pollution threatens to (12)prevent those wonderful sights from being seen.This VOA Special English ENVIRONMENT REPORT was written by Mario Rit