In India, National Ambient Air Quality Standards (NAAQS) were first notified under the Air (Prevention and Control of Pollution) Act, 1981, in 1982. However, among the options provided, 1994 is a significant year for the revision of NAAQS, particularly updating standards for major pollutants like SO2, NOx, and SPM, and adding Lead to the list. This notification was published on November 18, 1994.
National Ambient Air Quality Standards for major pollutants were notified by CPCB in
Asked in WBCS Main Paper 4 2021 · Topic: Pollution (Air Pollution: Types, sources, primary & secondary pollutants, smog, acid rain, effects, control technologies & policies.)
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