today’s et carries an updated version of the air quality story published yesterday — the story got reworked once i got the cpcb’s answers. as things stand, its answers resolved some of the questions in the previous avatar of the story and triggered newer ones. do take a look. and, here, the q&a with the cpcb on the air quality index.
For some time now, India has been putting out her air quality numbers. Visit the website of the Central Pollution Control Board (CPCB) or the State Pollution Control Boards (SPCBs) and you will find them. In the odd city, you will see LED displays giving real-time updates on air quality in the city. How accurate are these numbers?