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Q&A How could a force field dome be realized in my city?

In relation to this question, how could I create a force field dome over that city? Specifications of the city: 10 x 40 km on the surface 1 km in height has a city wall of 100 m all around the ...

7 answers  ·  posted 10y ago by Fulli‭  ·  last activity 6y ago by Fulli‭

Question reality-check