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Data Blindspots, Weak Rules: Inside Delhi's Annual Battle For Clean Air
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Context
What happened: Delhi recorded a daily average PM2.5 concentration of 257 g/m on Diwali, making it the fourth most polluted day of the year, per NDTV's report on the city's annual clean air battle.
Key numbers: Diwali ranked as the fourth most polluted day of the year. Daily average PM2.5 concentration was 257 g/m.
Why it matters: The report frames the reading within Delhi's recurring annual struggle for clean air, citing data blindspots and weak rules as factors.
What changed
Delhi recorded a daily average PM2.5 concentration of 257 g/m on Diwali, making it the fourth most polluted day of the year, per NDTV's report on the city's annual clean air battle.
Why it matters
The report frames the reading within Delhi's recurring annual struggle for clean air, citing data blindspots and weak rules as factors.
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Nov 10, 2026 03:04 PM ET