Air Quality standard

Kolkata study finds air toxicity surges when PM2.5 breaches 70 µg/m³, threshold exceeds on 75% of winter days

Kolkata study finds air toxicity surges when PM2.5 breaches 70 µg/m³, threshold exceeds on 75% of winter days

05 May 2025

3 min read

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Desperate remedy

15 Nov 2003

1 min read

When will India wake up to freedom—from air pollution?

When will India wake up to freedom—from air pollution?

23 Mar 2015

4 min read

Down To Earth

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