One of the positive things that occurred in 2020 is that AQI in Delhi moved to the 'Good' category, thanks to low air pollution.ย 

AQI in Delhi
Source: AQICN

In fact, with an AQI of 46 (on Sept 1, 2020), the Delhi skies are a vision to behold and have been so, since the last few days. Here's proof:ย 

Literally, no filter needed!ย