Delhi, Mumbai & Kolkata among world’s 10 most polluted cities after Diwali

New Delhi, 13/10: Two Indian cities joined New Delhi to be among the world’s worst 10 for pollution on Monday morning, with smoke heavy in the air a day after revellers let loose with firecrackers for Diwali – the annual Hindu festival of light.

The capital New Delhi took, as it often does, the top spot. It had an air quality index (AQI) figure of 420, putting it the ‘hazardous’ category, according to Swiss group IQAir. But it was also joined in the top 10 by Kolkata in India’s east.

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