Gas furnaces and stoves are known polluters of indoor air: https://www.psehealthyenergy.org/gas-stoves-and-indoor-air-p...

Large gas plants are probably relatively clean overall, but the temporary, portable gas generators used by eg the xAI datacenter are not as tightly regulated and aren’t inspected or controlled in the same way. Given the particular corporate agent involved, I’d be surprised if any care at all were being taken to minimize air pollution caused by these portable generators.