1 . 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 that 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 animals that are active at night. 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 (节奏). 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, coal or gas is 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 (安装) 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.

1. What can we learn about light pollution?

A．It has little effect on plants.

B．It contributes to most cancers.

C．It is a negative fruit of light technology.

D．It affects animals’ behavior during the day.

2. Why does light pollution affect the climate?

A．It increases the temperature at night.

B．It creates clouds in parts of the Earth.

C．It stops the release of greenhouse gases.

D．It is related to the burning of coal and gas.

3. How can we contribute our part in reducing light pollution?

A．Forbid the use of outdoor lighting.

B．Use clean energy to produce electricity.

C．Avoid unnecessary lights at home and offices.

D．Reduce money spent on light in urban areas.

4. What can be inferred from the last paragraph?

A．Citizens should be banned to install outdoor lighting.

B．Only simple ways can help reduce light pollution.

C．There is no clear sky or stars over the urban areas.

D．Light pollution needs to be dealt with urgently.

2 . What has happened to the river?

A．The fish in it has died out.

B．It has stopped flowing.

C．It’s got badly polluted.

3 . 假定你是李华，你校最近发起了针对全球污染问题的宣传活动。请你在校报的英语专栏写一封公开信,给同学们提出建议，内容包括:
1.海洋里的垃圾越来越多；
2.空气污染严重;；
3.解决方法及建议。
注意：
1.词数80左右；
2.可以适当增加细节，以使行文连贯。
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