claim: The cement, iron and steel, and petroleum refining industries could see their production cut by 21% 19%, and 11% respectively.”
evidence: The 2012 share of world production from African soil was bauxite 7%; aluminium 5%; chromite 38%; cobalt 60%; copper 9%; gold 20%; iron ore 2%; steel 1%; lead ( Pb ) 2%; manganese 38%; zinc 1%; cement 4%; natural diamond 56%; graphite 2%; phosphate rock 21%; coal 4%; mineral fuels ( including coal ) & petroleum 47%; uranium 18%.platinum 69.4%.