Around me,I can see lots of changes have happened in my life.In recent years,more and more people are becoming richer and richer with the development of China economy.First of all,People in China can afford the cars and there are more and more cars in the streets now.But the problem of traffic appears,such as traffic accidents,air pollution and so on.Secondly,more and more people begin to enjoy the surfing in the internet.Not only the young people but also the middle aged and the old ones are interested in the net surfing.But some of them are too crazy about the video games and chat online.It is not good for their work and study,especially for their health.Great changes not only bring us happiness,but also bring us something bad.