Iron and Steel | Industrial Efficiency Technology Measures. Iron and steel are key products for the global economy. Since 2000, global steel production has grown by 75%, reaching billion tons of steel in 2011. 1 The sector is the largest industrial emitter of CO 2 (with direct emissions of Gt in 2006) and second largest industrial user of energy (consuming 24 EJ in 2006).
iron ore production south africa and chart
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