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9.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.

32.What can we learn about light pollution?A
A.It is a negative fruit of light technology.
B.It has no effect on plants
C.It contributes to most cancers.
D.It affects animals'normal activities in the daytime.
33.How does light pollution affect the climate?D
A.It reduces temperatures by days and makes nights warmer.
B.It creates more clouds over parts of the Earth.
C.It stops the release of greenhouse gases.
D.It causes global temperatures to go up.
34.How can we contribute our part in reducing light pollution?B
A.Forbid the use of outdoor lighting.
B.Don't use unnecessary lights at home and offices.
C.Reduce money spent on man-made light in urban areas.
D.Use clean energy to produce electricity.
35.It can be inferred from the last paragragh thatC.
A.Citizens should be forbidden to install outdoor lighting.
B.Only simple ways can help reduce light pollution.
C.Light pollution needs to be dealt with urgently.
D.There is no clear sky or stars over the urban areas.

分析 本文是科普说明文.主要介绍了光污染的定义、造成的危害及防治建议等.

解答 ADBC
32.A 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,光污染可以说是光技术的坏影响.
33.D 由第四段"It also leads to the release of greenhouse gases and global warming."可知,光污染会造成更多温室气体的排放,从而引起全球变暖,D项符合文意.C项与文意相悖,A、B项无依据.
34.B 根据最后一段"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,应选B项.
35.C 由文章最后两句,尤其是"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,应选C项,其他选项均与文章不符.

点评 做阅读时经常犯错的主要原因是,仅凭读过文章后残留在脑海中的一丝印象来勾选答案,这样便很容易掉入出题人故意设布下的题目陷阱.所谓阅读理解,对于题目的理解一定要忠实于原文,因此,每一道题都应该与原文作全面的对比与核查,再得出答案.也就是说,阅读理解的每一道题目,在原文都应该有明确的出处,我们把这一出处叫做原文相关句,(1)排除与原文相关句主题不一致的选项(2)排除与原文相关句态度相反的选项  (3)排除用于过于极端或负面的选项(4)注意结合文章主旨和主题去排除.

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