Air pollution is a cause of ill-health in human being

----- Nội dung dịch tự động từ ảnh -----
Air pollution is a cause of ill-health in human being. In a lot of countries
there are laws limiting the amount of smoke which 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 in
petrol produces a poisonous gas which often collects in busy streets surrounded
by high buildings. Children who live in areas where there is a lot of lead in the
atmosphere cannot think as quickly as other children and are clumsy when
they use their hands.
There are other long-term effects of pollution. If the gases in the atmosphere
continue to increase, the earth's climate may become warmer. A lot of the ice
near the Poles may melt and may cause serious floods.