The human history has been considered as a course of man’s migration from the country to the city, so urbanization is seen as the symbol of human civilization. Nevertheless, as we enjoy the conveniences of urban life, we also enjoy the conveniences of urban life; we also have to suffer many problems that urbanization brings to us. Among them, the environmental pollution is one of the most serious.
First, the explosion of city pollution causes harm to our natural environment. To obtain sufficient living space, urban residents sacrifice large areas of woods, fields and arable land to build roads and houses. Many plants and animals in turn lose their natural habitats and some may die from the process of displacement. Besides, the growing urban population also damages the ecosystem with a huge amount of household rubbish. Rubbish hills dumped on the outskirts are a case in point. Even if people bury or burn the waste, it may bring about soil or air pollutions.
Second, hundreds of tons of waste water from factories are contaminating rivers in city day and night. Gone are those days when people enjoyed swimming in the river and fishing on the bank. Sometimes, worse still, untreated sewage pouring from chemical factories poison directly urban water supply. Drinkable water has become a rare resource, and people have to take in somewhat polluted water. Then one of its results has been the emergence of many new diseases and more and more cancer cases.
Third, the rapid increase in the number of urban motor vehicles contributes to considerable pollution. With the expansion of the urban area and the extension of city roads grows a heavier traffic. Thousands of running cars, buses, and trucks produce a large quantity of exhaust fumes and it inevitably pollutes the air. Sometimes the air quality is so bad that people feel difficulty breathing and go to the oxygen bar to have a break. Moreover, the endless traffic leads to serious noise pollution. It is common to hear a car blowing its horn here and there, a truck thundering along the highway, a city train roaring around at night. These noises sound to me as if they were constantly mocking our modern civilization and urbanization.
Clearly, with cities growing in number and size, we urban residents also suffer a lot of pains. Our life quality can be threatened by environment pollution resulting from urbanization. And if the problem is left unsolved, our wish for a comfortable city life will only be a daydream.