The Mining & Metals (M&M) unit works on projects related to the mining and production of materials such as aluminum, coal, copper, iron ore, alumina and other metals and minerals. The unit operates on six continents and has completed hundreds of major mining projects as well as more than 1,000 mining studies.[127][128] It has also finished 42 major copper projects, 30 aluminum smelters, 15 major coal projects, and eight alumina refinery projects.[3]