An updated version of the air quality story

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.

all this is a followup to a story that appeared about ten days ago — on why india’s air quality data is garbage. you must see that.