For the sub criterias, I recommend the following:-
a)public awareness: along with other factors, I feel that public awareness is one of the most important aspects in determining how green a city is. Since other initiatives can only work with public cooperation which comes with public awareness.
b)progression towards being a greener city: it is important since initiative matters more than the result. Most cities in India are not green but many are trying so I found it necessary to add.
I will shortly suggest more potential topics.