Pollution Air quality AI Sustainability See all topics Follow Last summer, an abandoned factory in southwest Memphis got a new life courtesy of the world’s richest man. Elon Musk’s artificial intelligence company xAI moved in to transform this unprepossessing building into the “world’s largest supercomputer.” Musk named it Colossus and said it was the “most powerful AI training system in the world.” It was sold locally as a source of jobs, tax dollars and a key addition to the “Digital Delta” — the move to make Memphis a hotspot for advanced technology. “This is just the beginning,” xAI said on...