GK
ECOLOGY BIODIVERSITY CONSERVATION ENVIRONMENTAL ISSUES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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1994
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1974
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1984
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2004
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Detailed explanation-1: -With the goal of providing for the prevention, control, and abatement of air pollution, the first ambient air quality standards were adopted in 1982 by the Central Pollution Control Board (CPCB) and revised in 1994 and again in 2009.
Detailed explanation-2: -The mandate provided to the CPCB under the Air (Prevention and Control of Pollution) Act empowers it to set standards for the quality of air. The current National Ambient Air Quality Standards were notified on 18 November 2009 by the Central Pollution Control Board.
Detailed explanation-3: -The revised National Ambient Air Quality Standards (CPCB 2009) are notified for 12 parameters – PM10, PM2. 5, NO2, SO2, CO, O3, NH3, Pb, Ni, As, Benzo(a)pyrene, and Benzene. Although AQI is usually based on criteria pollutants (i.e. PM10, PM2.
Detailed explanation-4: -The U.S. National Ambient Air Quality Standards (NAAQS, pronounced /ˈnæks/ naks) are limits on atmospheric concentration of six pollutants that cause smog, acid rain, and other health hazards. Established by the United States Environmental Protection Agency (EPA) under authority of the Clean Air Act (42 U.S.C.