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Most of the pollution comes from inside the city, so encasing the city would be rather disastrous. And you can't really protect against the global warming, aka
by ptaipale 12y ago
Most of the pollution comes from inside the city, so encasing the city would be rather disastrous. And you can't really protect against the global warming, aka greenhouse effect, by building a greenhouse - because that's effecticely what encasing a city is. A very large greenhouse which gets very hot inside.
(The impact of encasements to pollution is observable e.g. at public transit: subway/metro stations have significant concentrations of small particles in the air. You know, the kind that people complain automobiles create. The fact is, also trains create them, and in closed spaces, like underground stations, the concentrations of particles grow big.)
- vorg 12y agoPerhaps "connected enclosures" would be a better term. The enclosures would be built gradually, incorporating present air-conditioned buildings but with air filtration systems added, and slowly extended to more and more areas. Many subway stations in Asia have a transparent seal between the tracks and waiting area which would be part of the enclosed zone boundary. You probably imagined a dome over a city when you read "encasing".
- ptaipale 12y agoI still don't quite get why cities should be any kind of enclosures. The world as we know it has these huge air filtration and CO₂-to-O₂ conversion systems called "forests", and I do not understand why cities should be disconnected from them (apart from perhaps protecting the forests).