Why are the human moving the big city? Please correct it for me.... Why are the human moving the big city? As we see, more and more people are moving the big cities to live and earn their living now. Although, i am living and working at Sai Gon - big city of Viet Nam, i prefer to live in countryside. The near years, at the big cities are haven too much the pollution. Such as the smoke from the factories and vihycles, industrial waste, noise spoil the environment seriously. About 70 - 80 % the air pollution caused by exhaust fumes and about 20 - 30% another is due to the factories and construction work. Moreover, many people drop litter everywhere. Then, traffic jam happen all the time causing every people many trouble. And the main proplem of my city is the sanitery system does not work well. And the consequen, after the heavy rains are a lot of the streets are flooded. Also, the city human is not touch with the nature. because there are too few the trees in city. And where ever have you ask by yourself that whether we are having enough the air to breath and it is fresh air ? So, what will you do to help the city better? let' s share with me. welcome you ...