I am appropriately corrected, thank you. After 20 years, I don't understand why that issue isn't at the forefront of the discussion, given how having a self-su

I am appropriately corrected, thank you. After 20 years, I don't understand why that issue isn't at the forefront of the discussion, given how having a self-sustaining independent ecosystem here on earth is much more likely to help with most of the global catastrophes people use to advocate for being a multi-planetary species. New plague that's 99.9% fatal? Button up and work on a cure. Asteroid impact that destroys surface life for 10,000 years? Good thing we have several self-sustaining independent ecosystems built underground. Need a place for 100 million climate refugees? Good thing we know how to build settlements that require little more than bare land and solar power.