The Indian government has unveiled a plan to measure the air quality throughout India. The Air Quality Index is active in 10 cities currently, with plans for it to be implemented nationally. The index measures for a number of chemicals, namely; Nitrogen Dioxide (NO2), Sulfur Dioxide (SO), Carbon monoxide (CO), Ozone (O3), Ammonia (NH3), Lead (Pb), fine particles known as PM2.5 and dust particles known as PM10. The air quality index is hailed as a step on the right path to curbing air pollution. Live information about the air quality in your area can be viewed online here