In Utah, Rio Tinto will replace its entire fossil diesel consumption with renewable diesel at its Kennecott copper operation in Utah from 2024. Kennecott’s fleet of 90 haul trucks and all heavy machinery will begin to transition to renewable diesel in the first quarter of 2024, along with consumption from the concentrator, smelter, and refinery.

The transition will reduce Kennecott’s Scope 1 carbon emissions by approximately 495,000 tons of CO2 equivalent per annum, comparable to eliminating the annual emissions of more than 107,000 passenger cars.

The renewable diesel is made from renewable biogenic materials sourced in the United States. It will be supplied through the existing diesel supply chain, as part of a continuing partnership between Kennecott and HF Sinclair.