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Chicago dug the world’s biggest flood-stopping tunnel. What if the city got it wrong?


Center for Neighborhood Technology, says that the Deep Tunnel imposed a massive opportunity cost because the city and the district did little else to adapt. The MWRD spent billions on what engineers call “gray infrastructure” (pipes, tanks, pumps) and virtually nothing on “green infrastructure”: rain barrels, detention ponds, green roofs, porous pavements, and other adaptations that would have kept water out of the system…Please click here to read Henry Grabar’s story, “Tunnel Vision,” in Slate. Warning: This story contains language that may offend some readers.

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