Review7

  Delhi residents were exposed to air that does not meet the National Ambient Air Quality Standards for more than half of 2020. With Winter coming, air pollution in India is going to once again hit crisis levels soon. At the individual level we can wear masks and use air purifiers in our homes, but more broadly, cities and municipalities have also been installing outdoor air purifiers over several years now — but do these actually work? Have smog towers and outdoor air purifiers made an impact on the air quality in India? Despite the outdoor air purifiers and smog towers, the PM2.5 concentration in India air is currently 5.2 times above the WHO annual air quality guideline. The air quality in India is simply not getting better even after all the money and efforts spent to curb the air pollution problem in the country. We talked to a number of experts to try and understand why this is, and whether there are any better solutions possible. Cities like Mumbai have been deploying Wind A...