India, May 10 -- Shreya talks to Sudip Sen about his journey in revolutionizing sanitation and public hygiene across India. Shreya: Mr. Sen, you've transformed the sanitation system of Indian Railways. What inspired you to take on this massive challenge, and how did you implement the changes? Mr. Sen: I was in the right place at the right time. In 2010, when I joined Stone India Ltd, I adapted Sunrise products to Indian conditions, launched multiwall paper sacks with biodegradable packaging, manufactured with German technology and British collaboration. I also launched imported tools for cutting and processing granites, marbles, and other stones. Luckily, I happened to meet the MD of Stone India Ltd, who had conceived the pathbreaking tec...