The national capital continues to wheeze as a thick blanket of smog has gripped Delhi and nearby cities post Diwali.

Air quality levels plummeted to hazardous levels as people violated ban on firecrackers, and from stubble burning in the surrounding farm belt.

Air pollution has created a public health emergency around the world and is now the biggest environmental risk for early death.

When our cities are visibly heavy with smog and air pollution seems out of control, how do we protect ourselves and some of the most vulnerable groups? Take the FIT quiz to find out.