Why Data Center Gas Plants Are So Much Dirtier
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- Amazon acquired an off-grid Texas power plant for a data center permitted to emit up to 33 million tons of greenhouse gases per year, relying entirely on simple-cycle turbines that waste significant heat compared to the combined-cycle units used at typical on-grid plants.
- Even at half its permitted emissions, Amazon's Texas facility would emit more greenhouse gases than 78 average-sized natural gas plants, per EPA data cited in the report.
- Simple-cycle turbines are proliferating across major AI data center projects: Williams is building three plants in Ohio for Meta, Crusoe is installing 39 for Microsoft's Stargate campus in Abilene, Google uses 20 at its Goodnight site, and xAI's Colossus 1 and 2 in Memphis rely on dozens — all permitted to release millions of tons of emissions.
- Developers favor simple-cycle units because they're faster and cheaper to install amid a yearslong backlog for turbine orders, and they can rapidly start and stop to match AI training's spiky energy demands — though some turbines have broken from the extreme stress of constant cycling, according to data center operators.
- Simple-cycle turbines sidestep water use entirely, which Amazon's permit application lists as an "environmental benefit" — a selling point as water consumption becomes a flashpoint for communities near data centers.
- If the AI bubble bursts or tech demand dips, these massive decades-long gas plants could become what energy analysts call "stranded assets" with no remaining purpose, per Industrial Info Resources' Britt Burt.
Why it matters: Data center developers gain speed-to-market by defaulting to the least efficient turbine technology during a yearslong supply chain backlog, locking in decades of higher emissions per unit of power. Communities near these plants bear the localized air quality impacts while the source warns the infrastructure could become stranded assets if AI demand falters.
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