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Beyond Winter: Cities Battle Rising Summer Pollution
2 Jun
Summary
- Summer pollution driven by coarser PM10 and ozone.
- Heat and sunlight catalyze ozone formation in summer.
- Cities battle natural dust storms and human activity.
Air pollution in Delhi and other major Indian cities is shifting from a winter concern to a year-round challenge, with significant summer episodes observed. While winter smog is typically associated with PM2.5, the warmer months are characterized by higher levels of coarser PM10 particles and ozone.
Ozone forms when pollutants react under strong sunlight, a process exacerbated by hot weather. Natural phenomena like dust storms, including the 'loo' and localized 'andhi,' significantly increase PM10 levels. Human activities such as construction, industrial emissions, and vehicular traffic on dusty roads worsen this natural dust load.
To combat this evolving pollution landscape, cities are implementing air quality early warning systems and extending GRAP measures. Enforcement of dust control at construction sites and initiatives to reduce vehicle emissions, like turning off engines at red lights, are vital. Comprehensive summer action plans combining forecasting, public advisories, and stricter emission controls are necessary for sustained improvement.
