Gửi bạn mik may mắn là đã làm trước nên nhanh thế đó:

Today, people face a lot of serious diseases, and pollution is one of the reasons. The most serious problem is air quality. We built too many factories and released too much smoke into the atmosphere, and it made the air get worse and worse. We sucked all the direct toxic chemicals, and I don't know why people don't value them. One thing that is easy that most of us can do to help improve air quality is moving to public transport. 10 people may need 10 different motorbikes, but we can reduce smoke from those motorbikes using buses or the subway. We also depend too much on air conditioners also producing negative effects on the air, and it's better if we can use the fan instead of the day not overheating. The air is very important to us, and we need to keep it clean to have a healthy life.