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Re:A new way to make steel could cut 5% of CO2 emissions at ... by foobarian on Tuesday November 06, 2018 @09:20AM (#18391170)
Wow, TIL. This has some details at "5 year old level:" https://www.quora.com/What-is-the-difference-between-iron-an...

The phase diagram is very interesting too. Very little carbon is needed to go from elemental iron to steel, looks like about 0.008%. Thanks for posting that!

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