🔬 Science Jun 26, 2026 · Ben Sullivan

Climate Change Is Eroding the Cheapest Way to Cool the World’s Data Centers

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Somewhere right now, in a windowless hall packed with humming server cabinets, a building is breathing. Cold outside air gets pulled in through louvered vents, washes over rows of processors running hot, and leaves warmer at the other end. No chillers, no refrigerant, barely any extra electricity. It is about the cheapest, greenest trick in the data center playbook, and it has a name: direct air free cooling.
The catch is that it only works when the air outside is cool and dry enough. And that,

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