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Overpopulation of urban areas has led to numerous problems. Many people have immigrated to urban areas over the past few decades, dreaming of a better life. Hence, cities have become overpopulated, which in turn has resulted in many hardships for their dwellers. It is argued that high costs of living and transportation difficulties are two of the most major problems that overpopulation has caused in cities. However,Tthese issues can be tackled through better and more intelligent planning. To begin with, costs of living in mega cities have increased uncontrollably, due to the ever growing population density in these areas. The High price of properties and apartments leads has led to slums extension and a vulnerable lifestyle amongst those who can't cannot afford these costs. Only when people are not satisfied with their lifestyle, would will they think of immigration. The main idea to prevent this, is to reverse the immigration process through developing the industries and tourism in rural areas to prevent people from moving to mega cities. In addition, many cities face traffic jams nowadays owing to countless numbers of personal cars. For instance, it's it has been said that each citizen of Tehran wastes 200 hours of his life in traffic jams per year. A feasible way to counter this issue is to invest in public transportation. Developing new transportation systems such as subways, BRT and monorails results in fewer less use of personal cars, .moreover, it's more sustainable and decreases the air pollution. As is clear, reversing the immigration process to cities through rural development and establishment of alternative means of transportation are effective ways to counter the negative effects of overpopulations in megacities. It is thus hoped that these strategies are put into practice by governments and local authorities.