Blue sky and sunshine. It invites you to go for a walk or visit the café around the corner. However, in many cities, it is now becoming a health hazard to do so. Automotive exhaust gases cause pollution that exceeds exposure limits and contaminates the air that inhabitants of major cities breathe.
In New Delhi, sports events in the winter are unthinkable. Back in December 2017, a cricket match between India and Sri Lanka had to be interrupted because the guest team fell victim to severe nausea. That day, the fine dust pollution exceeded the WHO exposure limit by a factor of 12.