expansion of cities
...f cities. Two reasons can be attributed to this situation. First, the transformation of faming society to industry society, a natural development in the evolving process of human society, stimulates the expansion.of cites. This is not to blamed. However, the second factor , man-made pushing the process is really to be debated. For instance, some government officials try to transform more green lands to set up more industry land for the need of attracting foreign investment or purely for their political achievement without reasonable planning. If uncontrolled, sever consequences will occur Firstly, environment will become worse. With the losing of forests, faming land and even country road, local residents , animals and plants will be facing a big threat due to the dramatic change of their habitation. Second, cities are challenged by a series of issues as a result of its overpopulation. It is repo...