My apologies: I thought I was entering details but they somehow turned into an "answer". What I meant to say was:
A lot of people say we must colonize other planets in case the Earth becomes uninhabitable. But all other planets in our system are also uninhabitable, which means we must create habitable environments on those planets to live on them. But if we can develop the capability to do that, why can't we just use that technology to create habitable environments on Earth?
thomas f2019-08-19T11:25:59Z
I have read that if the Sahara desert and the continent of Australia were both intensively irrigated and farmed, then the Earth could support 100billion people or more. And we could populate the interior of the South American jungle, northern Canada, Siberia, and the like. We could cut down all of the trees and turn all of the land to crop land. In so doing we could press all other larger animal species to extinction, except those that we would be farming for their meat for us to eat. Is that the kind of planet you want to live on? Not me.
"Colonize" Earth? Already done. We treat Earth like it is some kind of colon. It is at the receiving end of all the waste, pollution and just plain crap that humans produce. It is backing up. We are swimming in our own filth. And choking on it. About time we treat the Earth like the single perfect home for us that it really is.