GK
ECOLOGY BIODIVERSITY CONSERVATION ENVIRONMENTAL ISSUES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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According to National Ambient Air Quality Standards, the annual average concentration of Sulphur dioxide in residential areas in India is
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20
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40
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60
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80
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Explanation:
Detailed explanation-1: -Note: The limit value is 125 µg SO2/m3 as a daily mean, not to be exceeded more than three days in a year.
Detailed explanation-2: -According to the National Ambient Air Quality Standards (NAAQS), the permissible limit of NO2 (24 hr. average) in ambient air in a residential area is 80 µg/m3.
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