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Steel forms the backbone of our modern world, with over 1.5 billion tons of steel produced globally every year. However, the production of iron and steel contributes over 7% of global greenhouse gas emissions, and it will be paramount to reduce those emissions to combat climate change. Green Steel Printing is a proprietary metal 3D printing technology that uses laser heating to directly manufacture steel objects without emitting any carbon dioxide. By fully converting iron-oxide ore to iron with green hydrogen, and then 3D printing steel parts in a continuous laser-powered process, Green Steel Printing has the potential to revolutionize the manufacturing of iron and steel parts into a clean, zero-emissions process.