Delhi 'Air'pocalypse It's too hard to change all of these carbon sources overnight, but it's much easier and much simpler to change the sources that are causing the black carbon particulates that are cooling the ground and warming the upper atmosphere, causing the temperature inversion. So your problem really is about stagnation as well as pollution, and you can target the stagnation problem much more simply with diesel particulate filters: Devabhaktuni Srikrishna #5Live | Sonal Mehrotra Kapoor