I have written several posts on sustainability, @TusharSuradkar, including how sustainability can be mapped on Google Maps. The point is not about how I map it, but about the fact that Google Maps provides us with the option to add and highlight sustainability attributes for a POI.
I have also tried to explain here what can be discussed, what we can look for while mapping a POI.
Hope this post helps bring more clarity and encourages more Local Guides to explore and map sustainability attributes on Google Maps.