How fresh is the air we breathe?

Several new media have happily started reporting the air quality situation in different cities of the country. Several times the concentration of pollutants exceed the standards specified at an alarming level. Unfortunately, these have become mere statistics that neither the governments seem to be responding to nor the society at large. Delhi is one city that has seen maximum pollution related interventions in the country - phasing out of old vehicles, introduction of CNG, BRT system, huge investments in road infrastructure to ease congestion, etc. However, as reported recently, New Delhi has the world's worst air pollution.

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