A startup wants to launch tens of thousands of mirrors into space to reflect sunlight onto Earth at night—potentially lighting up entire regions after dark. Supporters call it innovation, but critics warn it could disrupt ecosystems, human health, and even the natural night sky itself.

Gregory Wrightstone, geologist and Executive Director of the CO2 Coalition, joins the program to break down who gets to decide if this goes forward—and whether this crosses the line from innovation into global overreach.

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