The reason why most of the people move to cities from countrysides is because there are more job opportunities in cities. This is what they call urbanization, the process of making a specific area more and more urban. Furthermore, cities provide better living standard. Despite of the fact that, metropolitan areas provide more benefits to us, there are some drawbacks of living in such areas. It includes more crime rate, stressful days and traffic jams. Some nations are working to encourage citizens to use bicycle and local transport so that traffic problems can be solved.