Solar power tower technology concentrates sunlight through vast mirror fields onto a central receiver, generating extreme heat for electricity production & industrial use. SolarReserve's Crescent Dunes plant in Nevada stores ten hours of energy in molten salt, generating power after dark. ArcelorMittal invests ten million dollars in Heliogen, whose artificial intelligence-enhanced solar towers can replace fossil fuels in steel & cement production. Abengoa built the world's first commercial solar towers in Spain, while BrightSource Energy operates the world's largest at three hundred and ninety-two megawatts in California.