As India celebrated Diwali on Thursday, the environment ministry’s efforts to capture changes in air quality were spotty at best – with the information either inadequate or simply outdated. Given such lapses in data gathering, it’s anyone’s guess what kind of air most Indians were sucking into their lungs. In Delhi, at about 10 pm, the “real time” air quality data on the website of the Central Pollution Control Board was anything but real time. Its station at Civil Lines in north Delhi, for instance, reported air quality numbers captured on September 12, 2013. It’s not clear why the system failed to provide updated numbers.