8. product

9. celebration

Part V:

Air pollution is a cause of ill-health in human beings. In a lot of countries, there are laws limiting the amount of smoke factories can produce. Although there isn't enough information on the effects of smoke in the atmosphere, doctors have proved that air pollution causes lung diseases. The gases from the exhausts of cars have also increased air pollution in most cities. The lead of petrol produces a poisonous gas, which is often collected in busy streets surrounded by high buildings. Children live in areas where there is a lot of lead in the atmosphere can't think as quickly as other children and are clumsy when they use their hands.

Chúc bạn học tốt, cho mình ctlhn nếu mình đúng và nhanh nhất nha ^_^

Mình không rõ í bạn có phải câu 8,9 ở phía trên không nhưng tạm thời mình làm trên đó.

8. Production

9. Celebration