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Ozone Pollution

Facts for Prelims (FFP)

 Source: HT


Context: As per the CPCB, Ground-level ozone (O3) has started to emerge as Delhi’s lead pollutant during the day, particularly after rain, according to data from the Central Pollution Control Board (CPCB)


About Ground-level Ozone:

 Ground-level ozone is a type of pollutant that is produced when two primary pollutants, nitrogen oxides and volatile organic compounds, react in sunlight and stagnant air. It is referred to as a “secondary” pollutant because it is not directly emitted, but rather formed through chemical reactions between these primary pollutants.

Type of ozoneLocationEffectsGovernment efforts
Good ozone (Useful)StratosphereForms a protective layer that shields us from harmful UV raysKigali Amendment and Montreal Protocol to phase down ozone-depleting gases
Bad ozone (Harmful)Troposphere (Ground level Ozone)Harmful air pollutant; causes damage to crops and forests, respiratory system irritation, worsens lung conditionsShifting to BS-VI compliant vehicles, shutting down of thermal power plant, banning of garbage burning, GRAP, the launch of NCAP, setting up monitoring network for air quality assessment

About CPCB:

 The Central Pollution Control Board of India (est. 1974; HQ: New Delhi) is a statutory organization under the Ministry of Environment, Forest and Climate Change. It was established in 1974 under the Water Act, 1974, but is entrusted with the powers and functions under the Air Act, 1981.