New Delhi, April 1 -- Diya, second-year student of Delhi University from Bihar, skipped all the classes of the third semester. She said that Delhi's water had given her facial rashes, and she felt it was inappropriate to attend college in such a state. Another student from the same university, Vansh from Delhi, gave a similar justification.

My domestic help from Uttar Pradesh complained of rashes a few days ago and requested time off to see a doctor. My neighbour, Dr Das, is a medical practitioner who frequently sneezes, making other people and his patients uncomfortable. In fact, this allergy has affected his profession.

The air quality index in the capital city is always fluctuating between severe and very poor. Emissions from industr...