May 31 is World No Tobacco Day. The author Dr Pankaj Chaturvedi is a professor and cancer surgeon at the Tata Memorial Hospital and one of the most prominent anti-tobacco campaigners in the country. His efforts have been lauded around the world and he was recently awarded the Wilkenfeld award in the US for his innovative leadership. The views expressed here are the personal views of the author. Health.India.com doesn't necessarily endorse those views. It is a well-known fact 50% of all cancer cases caused in India are caused by tobacco use. In my work (I am a Professor and