While we do not have an index, the Central Pollution Control Board publishes a list of cities with their AQI levels and the dominant pollutant in the air on a daily basis. This AQI is often treated as a scale to compare the cities with each other.

The tree censuses, although primarily led by municipal authorities, have sought collaboration from citizen groups, NGOs, and CSOs. Often, experts in the field assist in identifying heritage trees, exotic species, native species, and other such details, which are then made available to citizens.