Inside Tokyo's $110 Billion Shield Against Disaster

Japan has built the world's largest underground flood tunnel—a $2 billion structure massive enough to fit a space shuttle. The result? A 90% reduction in local flood damage. Check it out on this week's episode of Primer https://www.bloomberg.com/news/videos/2026-05-20/the-global-business-of-adapting-to-flood-risks-video

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