Dalian is developing so fast, so more and more people from the countrysides moved to the city to find jobs. That makes the population of Dalian grow faster and faster and population increase causes many problems. First, with more and more people in the world, more and more water is used, more and more water is polluted. There is so much traffic on the roads that the air is heavily polluted in Dalian. Second, we need better public services, such as more schools, hospitals and buses, we also need more police to protect us. We should face the problems. Everyone in Dalian has to make more efforts to protect the city against pollution we shouldn’t throw rubbish everywhere and plant trees as many as possible. I hope that the environment in Dalian will be more pleasant. So, let’s do everything we can to protect our city! 本文来源：https://www.wddqw.com/doc/3db457cb0b4e767f5bcfced2.html