@florianjehn I have no clue how all people can be cramped in bunkers. I think the combination of bunkers and current infrastructure is a viable solution. The little door in the subway in Berlin, which lead to all kind of rooms, one big one with bunkbeds and toilets.
For the Netherlands, we need to build houses on water, since we will get flooded due to climate change, and bunkers below the ground for a potential war…😬 We are screwed. 🤭