II. Read the passage and fill in the information.
Air pollution causes ill health to human beings. In a lot of countries, there are laws limiting the amount of smoke which factory can produce although there is not enough information on the effects of smoke on the atmostphere. Doctors have proved that air pollution causes lung disease. The gases from the exhuasts of cars have also increased air pollution in most cities. The lead in petrol produces a poisonous gas (khí độc) which is collected in busy streets. Children who live in areas where there is a lot of lead in the atmosphere can not think as quickly as other children, and are clumsy (vụng về) when they use their hands.
29. What does the air pollution cause?
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30. Who have proved that air pollution cause lung diseases?
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31. Is there pollution in the city?
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32. What happen to the children who live in the areas where there is a lot of lead in the atmosphere?
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33. Have the gases from the exhuasts of cars increase air pollution?
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34. Where is a poisonous gas collected?
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