Status of air pollution during winter of 2015-16 and the impact of odd-even car rationing scheme on air quality

This winter has witnessed extremely high level of pollution. Typical winter conditions --cold temperature, lower mixing height of air, calm and no-wind conditions trap air and pollution. As a result, pollution builds up very quickly and peaks. This is why winter months require tougher emergency action to reduce pollution. Weather is an important constraint in pollution management.