Model Question and Answers for APSC | Mumbai, Delhi and Kolkata are the three megacities of the country but air pollution is a much more serious problem in Delhi as compared to the other two. Why is this so?

Mumbai, Delhi and Kolkata are the three megacities of the country but air pollution is a much more serious problem in Delhi as compared to the other two. Why is this so?

​Mumbai, Delhi and Kolkata are the three megacities of the country but air pollution is a much more serious problem in Delhi as compared to the other two. Why is this so?