Treatment of materials, namely,minerals, ores, concentrates, mineral substances, coal, crude oil, petroleum products, natural gas and liquefied natural gas; processing of chemical products, metals including scrap metals, coal, crude oil and petroleum products, biomass materials, biofuels, natural gas and liquefied natural gas; metal casting; refining services, namely refining of metals and fuels; power generation; metallurgical smelting, hydrometallurgical refining and/or blending services in...