The NAACP sued xAI last month, alleging it violated the Clean Air Act. That apparently hasn't stopped the company from expanding its use of portable gas-fired power.

Emails show that Elon Musk’s company is expanding its use of portable gas-fired power at its Colossus 2 site as a fight over air quality continues.

Gas turbines at xAI's Colossus 2 data center have drawn a lawsuit over the company's use of "mobile" gas turbines as power plants.