> "We aim to inform debate with clear, sourced numbers while avoiding sensationalism."
This is a great aspiration, but it seems to be contradicted by the rest of the page, which provides unclear numbers from unsourced categories.
> CO₂: $AI_{CO_2e} \approx (AI_{electricity} \times grid_{emission\_factor})$
How are you accounting for Power Purchase Agreements (PPAs) and Renewable Energy Credits (RECs)?
> Water: $AI_{water} \approx (DC_{water\_per\_kWh} \times AI_{electricity}) + (PowerGen_{water\_intensity} \times AI_{electricity})$
Where do the values for $DC_{water\_per\_kWh}$ (the Water Usage Effectiveness, or WUE) and $PowerGen_{water\_intensity}$ come from? These vary wildly by cooling system (evaporative vs. closed-loop) and energy source (hydro vs. nuclear vs. gas).
> Electricity: $AI_{electricity} \approx (IT_{load} \times utilization \times hours) \times PUE$
How do you estimate $IT_{load}$? Is this based on TDP of GPUs? A specific list of GPUs? Market share estimates?
What is the assumed $utilization$ for inference vs. training?
Which $PUE$ is used? A global average? A regional one? A company-specific one?