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+Part 6: Complete each space with one of the words given below. Make changes if necessary (1,0m)
Increase
limit
prove
disease
quickly
poisonous
Air pollution is a cause of ill health in human beings. In a lot of countries there are laws (1)
the amount of smoke which factories increasingly produce. Although there isn't enough
information on the amount of smoke in the atmosphere, doctors have proved that air pollution causes lung (2)
air pollution in
most city. The lead in petrol produces a poisonous gas which often collects in busy streets surrounded by high
Poisonous gases from the exhaust of cars have also (3)
buildings. Children live in areas where there is a lot of lead in the atmosphere can not think as (4)
as other children and are clumsy when they use their hands.