For years scientists have been worried about the effects of air pollution on the earth’s natural conditions. Some believe the air inside many houses may be more dangerous than the air outside. It may be one hundred times worse.
Indoor air pollution can cause a person to feel tired, to suffer eye pain, headache and other problems. Some pollutants can cause breathing disorders, diseases of blood and even cancer. Most scientists agree that every modern house has some kind of indoor pollution.
People have paid more attention to the problem now. It is true that when builders began making houses and offices they did not waste energy. To do this they build buildings that limited the flow of air between inside and outside. They also began using man-made building materials. These materials are now known to let out harmful gases.
As the problem became more serious, scientists began searching for a way to deal with it. They discovered a natural pollution control system for building—green plants. Scientists do not really know how plants control air pollution. They believe that a plant’s leaves absorb or take in the pollutants. In exchange the plant lets out oxygen through its leaves and tiny organizations on its roots. Scientists suggest that all buildings should have one large plant or several small plants inside for every nine square meters of space. Studies of different plants show that each absorbs different chemicals. So the most effective way to clean the air is to use different kinds of plants. Having green plants inside your house can make it a prettier and more healthy place.
【小题1】Generally speaking, indoor air pollution may be more harmful than the air outside because .A．indoor air pollution can often make people seriously illB．man-made building materials give off dangerous gasesC．there may be more harmful gases outside the buildingsD．the air indoors is polluted, which is very harmful【小题2】Some kind of indoor pollution can be found in ．
Ａ．every modern house B．every old house
C．all kinds of houses D．all kinds of offices
【小题3】The indoor air pollution is caused by .A．the limit of the flow of air between inside and outsideB．the building way that the builders want to save energyC．the building things that are made of man-made materialsD．the man-made building materials and the limit of air-flow【小题4】The reason why we should use different kinds of plants to clean the air is that .A．plants can let out all kinds of pollutants indoorsB．plants may take in more oxygen which people needC．plants can absorb all kinds of harmful indoor chemicalsD．plants can make our houses prettier and more healthyB
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(答案→)B
解析：本文讲述了室内空气污染的原因并提出了解决的方法，就是在家里种植绿色植物。
【小题1】B 细节题。根据文章第三段最后2句They also began using man-made building materials. These materials are now known to let out harmful gases.可知B项是室内空气污染的主要原因。
【小题2】A 细节题。根据第二段最后一句Most scientists agree that every modern house has some kind of indoor pollution.可知在每一所现代的房子里都有室内空气污染的现象。故A正确。
【小题3】D 细节题。根据文章第三段To do this they build buildings that limited the flow of air between inside and outside. They also began using man-made building materials. These materials are now known to let out harmful gases.可知室内空气污染的主要原因是空气流通不够和材料的污染。故D正确。
【小题4】C 细节题。根据文章最后一段They believe that a plant’s leaves absorb or take in the pollutants. 和Studies of different plants show that each absorbs different chemicals. 可知不同的绿色植物能够吸收不同的污染的物质。故C正确。