Beyond that, Steel is 100% recyclable^, and that accounts for over 65% of US steel production. Recycled steel can be done in arc furnaces, requiring no coal coke. [1]
Info like this is at the tip of your fingers.
[0] https://www.worldsteel.org/en/dam/jcr:f07b864c-908e-4229-9f9...
[1] https://seekingalpha.com/article/3785906-metallurgical-coal-...
^ This rate is never achieved. Global average is ~90%, as some countries aren't efficient: http://www.steel.org/sustainability/steel-recycling.aspx
