Hertha Metals, based in Conroe, Texas, has successfully conducted tests on a new method for producing green steel that aims to minimize planet-warming emissions without increasing costs above traditional steel production. The startup, backed by tech billionaires Bill Gates and Vinod Khosla, has achieved a significant milestone by producing one ton of green steel per day in a pilot facility near Houston. Hertha Metals plans to build a larger demonstration plant with an annual capacity of over 9,000 tons in Texas, targeting commercial production by 2031 at a competitive price point against traditional steel. Steel production is a major contributor to global warming, prompting initiatives to reduce emissions. Hertha Metals' approach involves melting iron ore using electricity and natural gas, with the aim of simplifying the steelmaking process and reducing carbon emissions by more than 50% compared to coal-based methods. The startup's innovative technique has garnered interest as a potential solution for cleaner steel production, although challenges such as the high cost of green hydrogen remain. While the steel industry faces hurdles in transitioning to greener practices, Hertha Metals' progress signifies a positive step towards sustainable steel production. The startup's expansion plans and focus on producing high-purity green iron for essential technologies like rare earth magnets demonstrate a commitment to both environmental responsibility and economic viability. With investments exceeding $17 million and further funding rounds on the horizon, Hertha Metals aims to revolutionize the steel industry by offering a more sustainable and cost-effective alternative to traditional steelmaking methods.