Nowadays, the population problem has been one of the world's biggest problems. As a great country, China has the largest quantity of population. However, the high rate of population increasing, we will be face with many terrible things, such as environmental pollution and heavy traffic. Therefore,we must try our best to control population increasing.
内容全部来源于网络收集，如有侵权，请联系网站删除：QQ：24596024