Activity for user15170
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
How little water is needed to sustain human habitation? Supposing a roughly mars sized planet, how little surface water would need to exist to sustain a population of a size similar to pre-industrial earth (say 750 million?) The situation is somewhat unique in the sense that I'm hoping for a very significant portion of the planet to arid, Tatooine style.... (more) |
— | about 9 years ago |