build a national civilized city Now,our city aims to build a national civilized city.I hold the opinion that it's every citizen's duty to contribute his own share.As senior high school students,what should we do? On the one hand,a tidy and low-carbon environment is the most important factor of civilized city.So we should save energy and protect the environment.For example,behave ourselves,don't spit or litter everywhere,and make sure that the limited resources are supposed to be recycled.On the other hand,traffic rules are just like a symbol of civilization.Everybody should obey traffic rules and never run red lights.what's more?Taking part in various voluntary activities is beneficial to ourselves and the city.It's good for us to construct a harmonious society. All in all,our students should space no effort to help build a national civilized city.