After months of backlash over alleged pollution concerns, xAI has finally secured an air permit covering some of the methane gas turbines powering its Colossus supercomputer data center in Memphis, Tennessee.

xAI has been granted permission to run a permanent installation of 15 gas turbines at its Memphis data center. Shelby County Health Department gave the company a permit for the turbines, which the company says will act as a backup power source for the data center, at a meeting on Tuesday.

The company sought Clean Air Act permits for gas turbines powering the computer this winter — six months after they had begun spewing smog-forming pollution