Their concerns about drinking water are exaggerated, but technically your computer does use water if go far enough back. But once you do that, everything that uses electricity also uses water.

It's not nearly as much water as using ethanol gas.

How do you imagine your "local" AI was trained? Let me tell you, in a massive datacenter that used gallons of water.

Running AI is a smaller problem. A ton of power and resources go into training them.

Not to mention all the stolen work they are trained on.

You don't need AI for that. Grammar checkers existed for decades before AI.