Delhi air pollution levels at 'severe plus', authorities say - BBC.com
- Delhi air pollution levels at 'severe plus', authorities say BBC.com
- Pollution in Delhi hits record high, cloaking city in smog The Guardian
- India’s capital chokes as air pollution levels hit 50 times the safe limit The Associated Press
- Delhi shuts schools, bans construction as pollution levels hit new high Al Jazeera English
- India's worsening, "severe plus" air pollution forces even more dramatic safety measures CBS News