Air (24)_________ is the cause of ill-health in human beings. In a lot of countries, there are laws limiting the amount of smoke which factories can (25) _________ although there is not enough information on the effects of smoke on the atmosphere. Doctors have proved that air pollution causes lung diseases. The gases from the exhausts of cars also (26) _________air pollution in most cities. The lead in petrol produces a poisonous gas, which is often (27) _________ in busy streets circled by buildings. Children who live in areas where there is (28) _________lead in the atmosphere cannot think as quickly as other children, and are clumsy when they use their hands. 24. A. pollute B. polluted C. polluting D. pollution 25. A. produce B. producing C. to produce D. produced 26. A. increases B. to increase C. increase D. increasing 27. A. collects B. collect C. collecting D. collected 28. A. a lot of B. a lots of C. a lot D. a lots CÁC BẠN LÀM VÀ GIẢI CHI TIẾT GIÚP MÌNH VS Ạ