The Environmental Protection Agency closed a loophole this week that Elon Musk's xAI had exploited to rapidly stand up its first data center in Memphis, Tennessee. Musk's artificial intelligence startup created a kind of off-grid power plant for its Colossus facility by using a cluster of gas-burning turbines. The company was able to avoid air pollution permitting by classifying the turbines, which were mounted on trailers, as "non-road engines." The EPA's updated rule clarifies that those