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The real environmental cost of a single AI prompt

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Every Gemini prompt might feel weightless, but Google just shared what’s really happening behind the scenes.

Here’s the breakdown per text query:
– 0.24 Wh of electricity (about 9 seconds of TV time)
– 0.26 ml of water (five drops)
– 0.03 g of CO₂

Google highlights big progress: in the past year, energy per prompt dropped 33x and emissions 44x.

But experts point out what’s missing:
– Indirect water use (like cooling systems) isn’t included
– Carbon accounting methods may understate the footprint
– And efficiency doesn’t always mean less impact demand can surge as AI gets cheaper and faster

Zoom out, and the bigger picture becomes clear: Google’s overall emissions are up 51% since 2019, and AI data centers can use as much power as a small city.

Billions of prompts make even “tiny” numbers add up fast.

The real question is: will the industry move toward full transparency and consistent reporting standards or keep showing us only part of the story?

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