After War Free 3D model

Hi all This is my new piece and the image is talking about a city after World War 3, people can only live in ruins and really hard to find a water,food,or another else. The air is so polluted in most areas which can't be breathed in directly. I spent 6 hours to finish it,I hoped you like it,render using Cycles with the help of Google Collabs to make it work more faster.