另外一道简单的英语题目！

China is polluted severely, and this has become a serious problem for the people and the government. First of all, overpopulation has caused more wastes of gases, fuels, trees, etc. This can affect the quality of air therefore causing lung and breathing diseases. Secondly, the wastes produced by factories are either buried underground or thrown into rivers. This has already been a major issue, and it has polluted the rivers around in China, which implies that water might no longer drinkable or safe for human uses. Thirdly, the city lights during nighttimes has caused light pollution—that is, the waste of electricity and prevention of observing the wonders in the sky. In conclusion, the pollution level in China has reached a dangerous range, and it is crucial to start doing something to help the environment.

呼，自己手写的，请多指教～