This is the best tl;dr I could make, original reduced by 71%. (I'm a bot)

> Researchers from the University of Birmingham have developed an innovative method for existing furnaces that could reduce steelmaking's CO2 emission by nearly 90%. The iron and steel industry is a major cause of greenhouse gasses, accounting for 9% of global emissions.

> In blast furnace steel manufacturing, coke is used to produce metallic iron from ore obtained from mining - which releases large quantities of carbon dioxide in the process.

> According to Dr Harriet Kildahl, who co-devised the method with Professor Yulong Ding, their technology aims to convert this carbon dioxide into carbon monoxide that can be reused in the iron ore reaction.

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