阅读下列短文，从每题所给的四个选项(A、B、C、D)中，选出最佳选项。
As the population of the planet increases, so does the number of homes, businesses, parking lots, schools, airports and roadways．all these structures use electricity and need to be lighted．Humans demand these lights．They want their homes more comfortable and they want their streets sage．The problem is that researchers are fin ding that all the light is having a negative effect on humans and wildlife as well．
Less than 10 years ago I drove to a thinly populated section of my town, lay down in the middle of the road and watched an attracted meteor shower(流星雨)．The area was short of homes, street lights and traffic．If I did that today, I wouldn't be able to see the meteor shower sa well, and I would surely be run over by a car．
Nowadays scientists are finding light pollution can be almost as bad as carbon dioxide pollution．if you've ever taken a flight at night, the view is beautiful, but you must remember that all the light you see is wasted electricity is worldwide．
Additionally, electricity needs to be generated, and the generation of electricity creates pollution by giving off greenhouse gases．This affects the air we breathe and our quality of life．
Scientists are also studying the effects of light pollution on wildlife．Thou sands of birds die each year when they crash into highly ighted buildings, as they become puzzled by the light．It has been long known that tiny sea turtle hatchings become lost and follow lights on the shore instead of heading towards the sea．
Fortunately, light pollution is one of the easiest sources of pollution that can be corrected without a negative effect．Following some guidelines and a little searching on Google can give you many ideas on how to reduce your contribution to light pollution．
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