With economic development and population growth, the city size grows larger and larger, which brings about both advantages and a result of the city expansion, local people are enjoying the convenience of commercial business and their residential conditions have also improved, which leads financial investment to pour into the area as the other hand, it is unavoidable to have a bad influence on farmland and even result in destruction of it when a city addition to all kinds of pollution done to the land, wildlife is in danger and therefore, all these ought to be paid attention my opinion, tearing down unusable buildings can spare many areas inside the city, so it's unnecessary to expand outside and at the same time, careful planning should be done by the government to protect the wildlife and maintain the natural beauty.随着经济迅速发展和人口增长,城市规模也不断扩大,这既带来了好处同时又产生了问题。由于城市的扩张,当地人民享受着商业的便利,居住条件得到了改善,也吸引了更多的投资。另一方面,当城市扩张时,不可避免地必须注意。依我看,拆除不用的建筑物在城里可以腾出许多地方,因此不必向外扩张,同时政府应做周密的计划来保护野生动植物,保存自然美景。