Unhealthy ...

Toxic smog engulfed much of northern India on Monday and pollution readings in New Delhi hit their highest of this pre-winter ...

Whatever the causes of the smog, by one ranking Delhi was not just the most polluted city in the world, but “nearly five ...

In several areas of the city, pollution levels were more than 50 times higher than the World Health Organization’s ...

Air pollution chokes New Delhi every winter, but this year's smog has already derailed everything from transport and road ...