Season 4 of the NDTV-Banega Swachh Campaign takes a holistic view of Swachh Bharat with the focus on Waste Management, Air and Water Pollution. In this special episode, we speak to Sunita Narain, Director General, Centre for Science and Environment on the various aspects of Swachh Zameen, Hawa and Paani and look at examples of efforts, both at the government and individual level that are being done towards tackling this for a Swachh India. From zero waste cities like Alleppey, Pune and Mysuru, to an 80-year old swachh warrior who is a pioneer in composting to beach clean-up efforts and an app that forecasts Air Pollution and plants that can help combat indoor air pollution, we take a look at everything.