Steel is recycled more than almost anything. Why does it create so much pollution?

  • Steel is a major source of greenhouse gas emissions, even though lots of it is recycled every year. 
  • There isn't enough scrap to meet the demand, so most steel is made from mined iron and coal.
  • Recycling steel uses coal too, but an Australian steelmaker is experimenting with alternatives.
  • See more stories on Insider's business page.



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