Key Takeaways RIO produces the first copper at Johnson Camp using its Nuton technology for cleaner, faster output.Nuton shortens supply chains by producing copper cathode on-site while cutting water use and emissions.The site targets 30,000 tons over four years as RIO validates long-term performance and explores expansion.Rio Tinto Group (RIO) announced that it produced the first copper from the Johnson Camp mine in Arizona, leveraging its Nuton Technology. The successful deployment of Rio Tinto’s Nuton tec ...