>I'm a bit skeptical about this. I know diesel generators make these kind of pollutants, but I haven't heard the same about natural gas.

it is about gas turbine high temperature and pressure, not about natural gas. That is why diesel engine does it too, while it isn't such an issue for regular gas engine, nor for "simple" LNG burners/heaters.

What xAI does here sounds horrendous. 270MW of gas turbines dumping the exhaust straight into the neighborhood. It is like 1000 diesel trucks running their engine full power 24x7 near your house.