Engineering student Mark Peirce from the School of Mines poses for a portrait in the college's experimental mine in Idaho Springs, Colorado, U.S., December 9, 2021. As metals are used across many different industries that serve customers across various geographies, it is difficult for mining companies to account for the whole supply chain. The International Council on Mining and Metals , whose members include around 25 mining companies, on Thursday published guidance for all mining companies on how to account and report their Scope 3 - or indirect - emissions "to try and answer the problem of patchy data to make companies report consistently," its CEO Rohitesh Dhawan said at the conference. Scope 1 refers to a company's direct emissions, Scope 2 to indirect emissions from purchased energy while Scope 3 refers to all other indirect emissions, for example from a company's third-party suppliers. Mining companies have set targets to decarbonise and mostly aim to reach net zero by 2040 and 2050, but some are struggling to keep up.

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Persons: Mark Peirce, Kevin Mohatt, Virginia Dundas, Dundas, Rohitesh Dhawan, Rio, Adam Matthews, Clara Denina, Elaine Hardcastle Organizations: School of Mines, REUTERS, Reuters IMPACT, Council, Mining, Metals, Rio Tinto, Church of, Pensions, Thomson Locations: Idaho Springs , Colorado, U.S, Virginia, London