Sack the intern!
"One way to reduce AI’s impact is to place datacenters close to locations that produce clean energy. "
Hardly. That only minimises grid losses, other than that very modest gain it has no bearing on the NET impact of any DC.
The only way a DC's power impact can be significantly reduced is if the operator builds, or pays for the building of new low emission generating capacity that wouldn't otherwise have been built, and whose construction doesn't supplant or block any other public grid renewable projects. Otherwise, even with an over-the-fence power connection all that's happening is that the DC uses clean power that would otherwise have been used by the rest of the economy. In much of Europe, gas CCGT is the swing power source, so if (say) Microsoft contract to buy power from an Irish windfarm that was being built anyway, then instead of that new output supporting extant industry, services and consumers, chances are their demand has to be met by the grid's balancing mechanisms, most likely from EirGrid calling power from the UK grid, where it will be coming from CCGT. And because the UK gas grid tops up with loss-heavy LNG, the net emissions will be considerable. Pretty much the same scenario across most of Europe.
Note: Not sure if it's the Reg intern, or the McKinsey intern - I'll plump for the latter.