For 2025 the grid carbon intensity in Texas was 363gCO2eq/kWh, while it was 22gCO2eq/kWh in Sweden, so 16,5x more in Texas. Right now it's 427 in Texas vs. 50 in Finland ie. 8,54x more, like in the article (yes I looked the wrong country at first).

The reason is half of Texas electricity production is still fossil fuels (gas & coal) while mostly hydro, nuclear and wind in Sweden. So it's not really about ai, the models or the hardware. Fossil fuels make CO2, that's it.