- Delhi air pollution levels at ‘severe plus’, authorities say BBC
- Pollution in Delhi hits record high, cloaking city in smog The Guardian
- New Delhi air pollution: Schools closed and construction stopped as smog worsens to levels far above WHO safety limit Sky News
- India’s capital chokes as air pollution levels hit 50 times the safe limit The Associated Press
- Delhi imposes most stringent set of restrictions as smog hangs over Indian capital The Independent
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