Question

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1.Read the following passagecarefully : (8 marks)
About two-thirds of the world’s population is expected to live in the cities by the end of 2020, and, according to the United Nations, about 3.7 billion people will inhabit the urban areas some ten years later. As cities grow, so do the number of buildings that characterizethem: office towers, factories, shopping malls, and high-rise apartments. These structures depend upon artificial ventilation systems to keepclean and cool air flowing inside. We know these systems by the term ‘air conditioning’. Although many of us feel that air-conditioners bring relief from adverse weather outside, they pose many health risks. One such disease is called Legionnaires’ disease, which was first recognizedin the 1970s. this was found to have affected people in buildings with air conditioning systems in which 17 warm air pumped out of the system’s cooling towers was somehow sucked back into the air intake, in most cases owing topoor design. This warm air was, needless to say, perfect environment for growth of disease carrying bacteria originating from outside the building, where it existed in harmless quantities. Cases of the disease are becoming less with advanced systems designs and modifications to older systems, but many old buildings, particularly in developing countries still need monitoring. Ways in which air-conditioners work to ‘clean’ the air can inadvertently cause health problems too. One such way is with the use of an electrostatic precipitator, which removes dust and smoke from the air. (a)On the basis of your readingofthe passage make notes on it using a heading and sub-headings and at least four recognizable abbreviations wherever necessary. Supply a suitable title. ( 5 marks)(b)Write a summary in about 50words

Answer 1

Answer:

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Explanation:

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