In Bulk Ore Sorting the IMA BOSS is removing waste rock from mineral concentrator feed material and replacing it from ore recovered by sorting from waste rock. This is done before the material enters the energy intensive grinding and process which consumes up to 50% of the energy used in mining. Replacing waste with ore in concentrator reduces energy consumption and related CO2 emissions for per ton metal in the ore and concentrate. Moreover, the recovery ore from waste rock by sorting is done without increasing mining tonnage and related energy consumption. This means more metal per tons in mining and up to 20% less energy consumption and CO2 emissions in mining and processing. At the same time the BOS reduces the amount of mine tailings per ton of metal produced.