London-based photographer Srinivas Kuruganti’s interest in coal mining began during his many travels in India. In 1999, during a bus ride, he crossed a small town called Chandasi—a short distance from Varanasi in Uttar Pradesh. “The air was so thick with fine particles of coal dust that all the shops, houses and roads were coated black," Kuruganti recalls. “It’s as if the city was layered in coal dust." Chandasi, he learnt later, was the biggest coal depot in Asia.