Piles of secondhand books for sale in College Street, famous for its book stalls, North Kolkata, West Bengal, India, Asia

Two pedestrians walking along a street in Bow Barracks quarter of north central Kolkata (Calcutta), West Bengal, India, Asia

Open air vegetable market with seller and buyers in north central Kolkata (Calcutta), West Bengal, India, Asia

Sellers and buyers of fresh vegetables in street market in north central Kolkata (Calcutta), West Bengal, India, Asia

Sellers and buyers of fresh vegetables in street market in north central Kolkata (Calcutta), West Bengal, India, Asia

Buses in main street traffic jam in north central Kolkata (Calcutta), West Bengal, India, Asia

Pedestrians in north central Kolkata (Calcutta) back street showing contaminated city air, Kolkata, West Bengal, India, Asia