Beyond Dome City colonies to Shell Worlds or Paraterraforming as a shortcut to making planets habitable
Existing covered areas and domes on Earth are in the 30-40 acre ranges and with costs of $400 million to 1 billion. There is also strong material (EFTE) which is 100 times lighter than glass and which can lower costs by 4 times. Very large geodesic domes could cover several square miles on Mars. Mars …