----- Nội dung dịch tự động từ ảnh ----- There are a lot of disadvantages of living in a big city, air pollution is the most serious problems. Firstly, 1. air pollution/come/factories/city. 2. the number/ factories increase/ quickly. 3. This/make/ the air/ extremely polluted/ smoke/ factories. Secondly, 1. that there too many transportation means/ also make/ this problem/worse. 2. Exhaust/cars/motorbike/ be one the factors/ make / air polluted. Finally, 1. the city/be/noisy. among 2. Noise pollution come/machines/vehicles/industrial factories. 3. It may affect the mind health/behavior. To conclude, air pollution, which contributes to making more and more people get many serious diseases, such as lung cancer, tuberculosis and so on, is a big drawback of city life. 14