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The low-carbon aluminum deal comes as Japan targets zero net carbon emissions by 2050 through solutions such as wind and solar power and carbon capture and storage.

Rio Tinto’s high-purity aluminum known as RenewAl was produced at a renewable-energy-powered New Zealand aluminum smelter and sold to a Japanese buyer to reduce carbon emissions via the supply chain, Marubeni said.

Rio Tinto and Marubeni said it was done under a new strategic collaboration agreement focusing on delivering Rio Tinto’s responsible aluminum products to Japanese companies.

They did not disclose the identity of the buyer or value of the deal.