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RECENT EVENTS

WE CONTRIBUTE TO UNITED NATIONS SUSTAINABLE DEVELOPMENT GOALS
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RECENT PUBLICATIONS

Four years of National Clean Air Programme (NCAP) in Indian cities: Assessment of the impact on surface ozone during the period 2018–2022

Gopikrishnan et al., 2024

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  • Frequency of 8 h ozone exposure exceeding 100 ppb/year reduced after NCAP implementation.

  • Most stations show negative trends in surface ozone (0–0.03 ppb month−1) from 2018 to 2022.

  • Most cities, except in winter, shows an NOx-limited regime, where O3 production is limited by NOx.

  • Some cities show positive ozone trends; indicating the need for tailored mitigation strategies.

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