Green ----> Grey ?

A sight of rising sun was beautiful. Me and Megh were on flyover riding Activa. As we came down from flyover he no longer able to see sun because of tall buildings.

After few minute's silence he said  "now there should be grey color instead of green in our flag" 
I was surprised  "why?!"
He said  "increasing no. of concrete jungles"

Don't know from when but he has special affection for our Tricolour. Love to draw it, wherever he find these three colours together he attach it with national flag, keep asking history & evolution of  our flag and meaning of three colours. We have many conversations about Tricolour but such simple but deeper meaning thought has made me think about it. Increasing amount of deforestation/industrialization/construction reducing amount of green  and raising amount of grey on our land . We are proudly attaching terms like fertility, growth, prosperity, happiness etc. with green in our Tricolour but without real green Earth will any of above term be reasonable? Will this mad race of so called development lead us to replacement of green with grey?