CNN Business — March 24, 2021Heliogen is bringing its field of mirrors to the Mojave Desert. In a bid to bring carbon-free power to heavy industry, Heliogen announced that mining behemoth Rio Tinto plans to deploy the startup's breakthrough solar technology at California's largest open pit mine. Heliogen says this will be the first concentrated solar technology used to power a mine in the United States, and perhaps the world. Heliogen will use artificial intelligence and an array of 40,000 computer-vision-controlled mirrors to harness the power of the sun, almost like a smart magnifying glass. The first system at Rio Tinto will be the size of about 100 footfall fields.