The challenges of living in a big city The challenges of living in a big city. With the development of science and technology,more and more people move to big city. But this is a issue about living in a big city. In big city,everybody have to make money for family and eating food. Due to population rise,look for a job become a hard thing,this is a one of challenges. Sencondly,a student must focus on report card since very young because find a good job is so hard in big city. Finally,air pollution very serious in big city so a lot of people body be damage. To sum up,there is have so much problem in big city,but it is still colourful.