India, April 12 -- We often take indoor air quality even though it has pollutants from outside and those released indoors. The Air Quality Index (AQI) measures eight primary air pollutants: particulate matter (PM2.5 and PM10), ozone (O3), carbon monoxide (CO), nitrogen dioxide (NO2), sulphur dioxide (SO2), lead (Pb), and ammonia (NH3). Accumulation of these and many other indoor pollutants often makes the air in enclosed spaces worse than outdoor air. Dusting and sweeping instead of vacuuming increases particulate matter in indoor air. Carpets, linen, furnishings, and fixtures accumulate dust and allergens. Humidity encourages the formation of mold spores. Smoking, cooking, and heating with polluting fuels, as well as lighting candles and...