英语作业(作文)
初三 记叙文 1346字 74人浏览 最爱知道123456

Population Problem

In the human histioy, world population always keep a balance between the birth rates and the death rates. By the 17 century, with the better medical conditions and more food production, death rates dropped, making the population grow rapidly. When it comes industrialization age, birth rates of developed countries dropped results from the modern lifestyles in city rather than agrarian lifestyles. But in the non-industrialized nations, new agricultural and medical technologies lead to the high birth rates and low death rates, which cause the population explosion in the world. In 1999, the population is as two times as forty years ago, resulting in the serious social problems.

The more people we have, the more natural resources we need. But the overexploitation of resources add to pollution and waste, causing the climates change, acid rain and so on. Besides, we have to bulid more house and more land for agriculture to fit the big size of populationWe come into a bad circle of the increased population and resources.

Thearticle refer to the pollution owing to the large size of population concerns me the most. Because the pollution may lead to the acid rain or air pollution ,which is harmful to our health. Pollution also destroy the natural resources and ecosystem, threating the carrying capacity of the earth.