So Why Is Delhi's Air So Unhealthy?
The sources of air pollution in New Delhi are varied showing us how complex this problem is. We know vehicular emissions, nearby crop burning, trash burning, the emissions from 12+ coal and gas-fired power plants in Greater Delhi all play major roles in making our air so hazardous to human health.
It is the invisible, health-ravaging particles of PM 2.5 that have reached sky high levels in Delhi all year long, not just in the winter months. Remember there is no safe level of exposure of PM 2.5.
Graphic Source: urbanemissions.blogspot.in