听力原文：

With the development of science and technology, new products show up on the market every day. China has become a throw-away society. Some people throw away the old products like TVs, computers, washing machines and some other electric equipment and buy new ones. As a result, the thrown-away products will cause serious pollution to the environment. Another cause is that people throw their garbage everywhere. We can find metal tins, broken stuff, wooden chopsticks, and all kinds of packages in public places.

Question: What are the two reasons for pollution mentioned in the passage?

参考答案：

a. Some people throw away the old electric products and buy new ones.

b. People throw their garbage everywhere.