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Our business
We operate in 35 countries where our 60,000+ employees are working to find better ways to provide the materials the world needs
Our purpose in action
Continuous improvement and innovation are part of our DNA
Innovation
The need for innovation is greater than ever
We supply the metals and minerals used to help the world grow and decarbonise
Iron Ore
The primary raw material used to make steel, which is strong, long-lasting and cost-efficient
Lithium
The lightest of all metals, it is a key element needed for low-carbon technologies
Copper
Tough but malleable, corrosion-resistant and recyclable, and an excellent conductor of heat and transmitter of electricity
Bringing to market materials critical to urbanisation and the transition to a low-carbon economy
Oyu Tolgoi
One of the most modern, safe and sustainable operations in the world
Simandou Project
The world’s largest untapped high-grade iron ore deposit
Western Australia
While iron ore is central to our operations in WA, we have a diverse presence across the state, from salt, lithium, our diamond legacy and our promising copper-gold project
Providing materials the world needs in a responsible way
Climate Change
We’re targeting net zero emissions by 2050
Nature solutions
Our nature-based solutions projects complement the work we're doing to reduce our Scope 1 and 2 emissions
Enabling ESG transparency
Our START™ initiative tracks traceability and responsible production of Rio Tinto materials.
We aim to deliver superior returns to our shareholders while safeguarding the environment and meeting our obligations to wider society
2025 annual results
Announced on Thursday 19 February 2026
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Closing the aluminium loop
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We work and partner to keep resources in use for a more circular future
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Diesel made from renewable raw materials is helping us reduce emissions
Diesel is a common fuel in the mining industry, because diesel engines are powerful enough to move trucks that can be the size of a two-storey house on wheels, more than 7 metres tall, and carry hundreds of tonnes in every load.
But conventional diesel engines are a major source of greenhouse gas emissions, with diesel for our mobile fleet and rail representing approximately 13% of greenhouse gas emissions across our operations. Despite making advances globally in electrifying our mining fleets, we still rely on emissions-heavy fuel for transport, haulage and logistics.
In June 2023 our Boron operation in California in the US, we fully transitioned our heavy machinery from fossil diesel to renewable diesel – making it the first open pit mine in the world to achieve this milestone. The change to renewable diesel brought an anticipated CO2 equivalent reduction of up to 45,000 tonnes per year, comparable to eliminating the annual emissions of approximately 9,600 cars1. And it’s not just helping us to reduce greenhouse gas emissions from our diesel-powered haul truck fleet – it's also made from renewable materials.
Renewable diesel is chemically identical to conventional diesel, but it’s created from renewable raw materials instead of crude oil. Because it’s so similar, we don’t need to modify our existing diesel engines – our existing fleet of diesel trucks, trains and mobile equipment can switch straight to using it. Renewable diesel generates far lower greenhouse gas emissions, and doesn’t have a shelf life, meaning its storage and distribution is far easier. And it meets the ASTM D975 specification for petroleum in the United States and EN 15940 in Europe.
Given the success at Boron, we also trialled renewable diesel at our Kennecott copper operation in Utah during 2024 and 2025.
The team tested acceleration, speed, cycle times, fuel usage and engine inspection reports for 2 trucks running on renewable diesel versus 2 trucks running on conventional diesel, using the same methodology as the Boron team so they could compare the results.
Based on the success of the trial, Kennecott adopted renewable diesel between 2024 and 2026.
At Boron, we used Neste MY Renewable Diesel™, a hydrotreated vegetable oil made entirely from sustainably sourced renewable raw materials like used cooking oil and animal fat from the food industry. When used in its purest form, Neste MY Renewable Diesel™ can deliver up to 75% less greenhouse gas emissions over the full life cycle of the fuel than conventional diesel.2
The 7–month trial, started in 2022 in partnership with Neste and Rolls-Royce, showed trucks running on renewable diesel are as consistently reliable and efficient as trucks running on petroleum-based diesel, proving that it’s a viable alternative.
1 Source: United States Environment Protection Agency Greenhouse Gas Equivalencies Calculator. 45,000 tonnes CO2e is equivalent to greenhouse gas emissions from 9,696 gasoline-powered passenger vehicles driven for one year.
2 The GHG emission reduction percentage varies depending on the region-specific legislation that provides the methodology for the calculations (e.g. EU RED II 2018/2001/EU for Europe and U.S. California LCFS for the U.S.), and the raw material mix used to manufacture the product for each market.