1.大学生了解社会的必要性 2. 了解社会的途径(大众媒介，社会服务等) 3.我打算怎么做 With the development of our society, the campus no longer is an "Ivory Tower". It is necessary for college students to go outside to get to know the world. They should acquire knowledge not only from books but also from the society. Thus(因此) they can adapt to society more quickly after they graduate from school. Science and technology are developing rapidly with each passing day. Most students can keep themselves informed by watching TV, listening to the radio, reading newspapers and using computers. It’s also good to take a part-time job, such as tutoring(辅导), or working in a restaurant. Any of these methods will enable students to get in touch with society. Summer vacation will soon be here. I’ve already enrolled(登记) to be a volunteer to help others. I think I can do well. Although I won’t be paid, the most important thing is that I can learn a lot about society. Environmental pollution I read a piece of news recently. It says that in Japan marly businessmen ave selling fresh air to customers.and now it is becoming more and more popular. Why? --Fresh air is getting less and less in Japan, and so is it in the U. S. A. In fact, environmental pollution is a very serious problem the whole world is facing.it is mainly caused by the waste products released from artificial substances, industrial production and increased consumption of goods. Bedsides, the use of chemical substances in agriculture also causes environmental pollution. Look at the sky, you can see that dense smoke is being released from the high and big chimneys; those dirty and poisonous substances are flowing into the rivers that we use for drinking water and millions of tons of waste products are heaping around us. How to change this condition? More and more countries are trying to work out some effective means to bring it under control, but no great success has been made. 本文来源：https://www.wddqw.com/doc/01ba0965ff0a79563c1ec5da50e2524de418d009.html