Fossil fuel combustion has made dangerous heat waves ever more frequent. The short term answer — for those who have one — is to turn on the air conditioner. But air conditioning makes the the problem even worse. Environmental journalist Sam Bloch discusses the ways that cities used to be designed for shade, and stresses the urgent need for shelter from the sun — especially for the unhoused, farm workers, and others who labor outdoors.

Sam Bloch, Shade: The Promise of a Forgotten Natural Resource Random House, 2025

Photo by Ivan Padial on Unsplash

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