Datacenters emit no CO2. If we think our electricity grid is dirty, we should clean it up!
Datacenters emit zero CO2. Datacenters are products that people want to purchase, that in turn purchase electricity on the open market.
They are no different from space heaters, swimming pools, movie theaters, or any other product that uses electricity that people want to pay for, that use electricity.
If we believe that the electricity on the open market causes too much emissions, then that's the problem we should fix!
We could, for example, tax any extraction or importation of fossil fuels, that isn't offset by exactly as much direct carbon capture. (This will also effectively weed out all the incorrect DCC claims!)
These are just such basic economics, it boggles the mind that a normally rational site like The Register would still fall for the old "X uses electricity, therefore X is responsible for all electricity production externalities." No, it's not! At least not in the legal and market system we've built. So, if you want to fix problems with electricity production, you need to focus on fixing problems with electricity production!