>they need to redirect asteroids into low earth orbit/the orbit of the colony. (And then expend a ton of energy to match orbits.) Which basically means a susta

>they need to redirect asteroids into low earth orbit/the orbit of the colony. (And then expend a ton of energy to match orbits.) Which basically means a sustainable colony must produce a ton of energy. Good news, producing energy in the space is actually cheaper than on Earth: you have a lot of solar, and nuclear is no longer a hazard.