Solarpunk

I understand the arguments against it but I still think trees and greenery are such an important aspect of human health and wellbeing that it’s worthy of consideration in some situations. Particularly as the world continues to urbanize and densify to accommodate increasing populations, people won’t easily be able live around gardens, nature, and agriculture as they did in the past. So where else is left to restore that greenery than somewhere in or on the built environment? There are lower hanging fruits like planting more trees on the ground level but I don’t think those will be enough to reach the levels of vegetation/canopy needed for human health in areas where most of the land surface is buildings.

It may be difficult and expensive but it’s not over-engineered if it’s the best way to achieve a necessary goal.

That makes sense, because if you look at it for more than a couple of seconds, the scale is off all over the place. The trees on top make the bunker look absolutely enormous, just like it could rule over the entire city... but then you see the trees in front, which make the trees on top look like bonsais.