One million Blackwell GPUs would suck down an astonishing 1.875 gigawatts of power. For context, a typical nuclear power plant only produces 1 gigawatt of power.
Fossil fuel-burning plants, whether that’s natural gas, coal, or oil, produce even less. There’s no way to ramp up nuclear capacity in the time it will take to supply these millions of chips, so much, if not all, of that extra power demand is going to come from carbon-emitting sources.
Using tons of energy isn’t a problem, as long as it’s carbon neutral (or negative). The problem is that we are simply not there yet. Taxing carbon is a great solution and would nearly immediately fix the problem (on the scale of years, not decades).