D
We all have an idea about the common types of environmental problems. However, light pollution may be a new term to many of us. But, the fact is, it does affect mankind, other living forms and the environment as a whole.
What is light pollution? It presents all forms of misused man-made light. The obvious cause of light pollution is the use of outdoor lighting products improperly. It can be office lighting, car headlights, station lights, streetlights and many more.
Light pollution is harmful to both animals and plants. Upon studies, it is found that obvious effects are observed in the behaviour of nocturnal animals. Needless to mention , bright light at night makes it difficult for these animals to hunt, wander and perform their regular activities. Light pollution is directly or indirectly responsible for causing several diseases. Its effects are related to disturbance in the physical rhythm. It contributes to risks of developing cancerous cells. So, it’s nothing less than a threat to human health.
You have already seen the negative effects of light pollution on animals and human health. Apart from this, the actual cost of misused light is about millions of dollars every year. It also leads to the release of greenhouse gases and global warming. After all，fuels are used for producing electricity.
While outdoor lighting and using man-made lighting products are part of our modern lifestyle, some simple ways will surely help in reducing light pollution. For example，while installing outdoor lighting, make sure that they are pointed downwards . Also， use only the required lighting equipment for both home and offices. Believe it or not, many people living in the urban areas cannot view clear sky and stars at night. Let’s contribute our part in reducing the pollution.
12. What can we learn about light pollution?
13. How does light pollution affect the climate?
14. How can we contribute our part in reducing light pollution?
15. It can be inferred from the last paragraph that __________.
本题考查光污染的话题，推断判断题。根据第二段可知，光污染是滥用各种人造光源而形成的，即不恰当地使用户外照明产品，可以是办公照明、汽车车灯、方位灯、路灯等。由此推断，选项A中所述光污染可以说是光技术的负面影响。所以选择A选项是正确的。
推断判断题。根据根据第二段可知，光污染是滥用各种人造光源而形成的，即不恰当地使用户外照明产品，可以是办公照明、汽车车灯、方位灯、路灯等。由此推断，选项A中所述光污染可以说是光技术的负面影响。所以选择A选项是正确的。
不能正确根据全文理解光污染的弊病，推断失误。
本题考查光污染的话题，事实细节题。根据第四段：“It also leads to the release of greenhouse gases and global warming. ”光污染还会导致温室效应气体的排放和全球变暖可知D选项是最符合题意的，所以选择D选项是正确的。
事实细节题。根据根据第四段：“It also leads to the release of greenhouse gases and global warming. ”光污染还会导致温室效应气体的排放和全球变暖可知D选项是最符合题意的，所以选择D选项是正确的。
不能正确根据全文理解光污染对全球气候的影响。
本题考查光污染的话题，事实细节题。根据第五段：“Also， use only the required lighting equipment for both home and offices. ”可知在家里和办公室里只用必需的照明产品便可减少光污染，所以选择B选项是正确的。
事实细节题。根据根据第五段：“Also， use only the required lighting equipment for both home and offices. ”可知在家里和办公室里只用必需的照明产品便可减少光污染，所以选择B选项是正确的。
不能正确根据文章理解如何正确减少光污染。
本题考查光污染的话题，推断判断题。根据最后一段“Beleve it or not, many people living in the urban areas cannot view clear sky and stars at night”可知，光污染非常严重，据此推知光污染问题有待解决，所以选择C选项是正确的，其他选项均与文章不符。
推断判断题。根据最后一段“Beleve it or not, many people living in the urban areas cannot view clear sky and stars at night”可知，光污染非常严重，据此推知光污染问题有待解决，所以选择C选项是正确的，其他选项均与文章不符。
不能正确根据文章推断答案，推断失误。