The world's biggest miners have pledged to cut their greenhouse gas emissions to net zero by 2050 or sooner.
The news came in a letter published by industry body the International Council on Mining and Metals.
It was signed by the chiefs of the 28 top mining firms.
And covers 650 sites in 50 countries.
Though some of the signatories, including big names such as Rio Tinto, BHP and Anglo American, had already made similar pledges of their own.
The announcement comes before next month's U.N. climate gathering, which aims to ramp up action on emissions.
Signatories to the mining letter say they will reduce or eliminate their use of diesel vehicles, among other measures.
They will also provide annual reports on their progress.