A. HOUSE B. HOME C. BUILDING D. OFFICETEST 19AIR POLLUTION IS A (23...

8. a. house b. home c. building d. officeTEST 19Air pollution is a (23) _______ of ill health in human beings. In a lot of countries there are lawslimiting the amount of smoke which factories can (24) ________. Although there isn’t enough (25)_______ on the effects of smoke in the atmosphere, doctors have (26) _______ that air pollution causelung diseases. The gases from the exhausts of cars have also (27) ________ air pollution in most cities.The lead in petrol produces a (28) _______ gas which often collects in busy streets surrounded by highbuildings. Children who (29) _______ in areas where there is a lot of lead in the atmosphere can not thinkas (30) _______ as other children and are clumsy when they use their hands.