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Rio Tinto (ASX, LON: RIO) said on Friday it had completed the full transition of its heavy machinery at its at its Boron operation in the US from fossil diesel to renewable diesel, making it the world’s first open pit mine in the world to achieve this milestone.
The swap from conventional to renewable diesel brings an anticipated CO2 equivalent reduction of up to 45,000 tonnes per year, the company said. This is comparable to eliminating the annual emissions of about 9,600 cars.
Renewable diesel is chemically identical to what is currently sold at pumps, but it’s created from renewable raw materials instead of crude oil. Due to its essential similarities, Rio Tinto said it doesn’t have to modify its existing fleet of diesel trucks, trains and mobile equipment.
The new type of diesel doesn’t have a shelf life, meaning its storage and distribution is far easier.
“The transition at Boron is an important first step and will undoubtedly lead to further opportunities to decarbonize our global operations,” Rio Tinto Minerals chief executive Sinead Kaufman said in the statement.
Rio Tinto conducted the initial trial at the California operation last year in partnership with Neste and Rolls-Royce.
The conversion to renewable diesel supports the company’s global decarbonization objectives, which include a 50% reduction in Scope 1 and 2 emissions by 2030, and a commitment to reach net zero by 2050.
Rio estimates carbon emissions from the use of diesel in its mobile fleet and rail accounted for 13% of its Scope 1 and 2 emissions last year.
The Boron mine is California’s largest open-pit mine and the largest borax mine in the world. The mineral, essential to plant growth, is added to fertilizers. It is also used in high tech applications, such as heat-resistant glass for smartphones and materials for renewable energy.
