
Why the Moon Can't Support a City of 1 Million People, Even With All Its Water
As hopes rise around the Moon's estimated 1 billion tons of polar water ice, a new study pours cold water on visions of lunar megacities. Even with a 98% water recycling rate matching the ISS, a population of 1 million would exhaust that water supply in just about 100 years—revealing a hard limit on space colonization.








