The operator shall include at least the following potential sources of CO2 emissions: raw materials (calcination of limestone, dolomite and carbonatic iron ores, including FeCO3), conventional fuels (natural gas, coal and coke), reducing agents (including coke, coal and plastics), process gases (coke oven gas — COG, blast furnace gas — BFG and basic oxygen furnace gas — BOFG), consumption of graphite electrodes, other fuels and waste gas scrubbing.