With winters being round the corner, at the NDTV-Dettol Banega Swachh India 12-hour cleanathon, a panel of experts discusses the issue of air pollution in India. Experts discuss major sources of air pollution, use of technology and enforcement, policy initiatives and online surveillance. Not just outdoor pollution, but indoor pollution too grabs the attention. As Amitabh Bachchan challenges everyone to plant and nurture a tree, the panel also discusses the measurable impact of plantation on air pollution.