How swachh is the air we breathe? Polluted air doesn't just make you cough, wheeze or sick, but, it also kills you. Approximately 1.2 million deaths are estimated to have been caused by pollution. Air pollution has emerged as the largest environment risk factor. In this special episode of the NDTV-Dettol Banega Swachh India, we discuss why getting clean air is the need of the hour.