Q:
A passage with three blanks, followed by five options, each containing one word, is given. Choose the word that can fill all the three blanks.
Emission ____________ are the legal requirements governing air pollutants released into the atmosphere. Emission ___________ set quantitative limits on the permissible amount of specific air pollutants that may be released from specific sources over specific timeframes. They are generally designed to achieve air quality standards and to protect human life. Many emissions ____________ focus on regulating pollutants released by automobiles (motor cars) and other powered vehicles. Others regulate emissions from industry, power plants, small equipment such as lawn mowers and diesel generators, and other sources of air pollution. While this have been used to dictate limits for conventional pollutants such as oxides of nitrogen and oxides of sulphur (NOx and SOx), this regulatory technique may be used to regulate greenhouse gasses, particularly carbon dioxide (CO2). In the US, this is given in pounds of carbon dioxide per megawatt-hour (lbs. CO2/MWhr), and kilograms CO2/MWhr elsewhere.
Answer & Explanation
Answer: D) Standards
Explanation: From the given passage it is evident that we have to take the word filling the blanks in relation to the word ‘emission’ which means the production and discharge of something, especially gas or radiation. ‘Norms’ refer to a standard or pattern, especially of social behaviour, that is typical or expected. Thus ‘emission norms’ cannot be a correct term as it is not related social behaviour. ‘Pollutants’ mean a substance that pollutes something, especially water or the atmosphere. If this word is used in the given first blank it does not provide the correct term being defined. ‘Factors’ refer to a circumstance, fact, or influence that contributes to a result. ‘Standards’ refer to a required or agreed level of quality or attainment. ‘Limits’ means a restriction on the size or amount of something permissible or possible. Of all the given options ‘factors’ and ‘standards’ can be seen as the most appropriate words for the given blanks. But an emission factor is a representative value that attempts to relate the quantity of a pollutant released to the atmosphere with an activity associated with the release of that pollutant. Thus, option D is the best fit answer for the given blanks
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