A study conducted by MIT engineers has introduced a scalable and sustainable method for producing green hydrogen, a climate-friendly fuel that does not emit carbon dioxide when used. By combining seawater, recycled soda cans, and a rare-metal alloy, the team successfully demonstrated a low-carbon process for hydrogen production. This process involves aluminum reacting with water to produce hydrogen gas efficiently. The researchers conducted a life cycle assessment to evaluate the environmental impact of the industrial-scale process, highlighting the minimal carbon footprint of 1.45 kilograms of carbon dioxide per kilogram of hydrogen. This low-carbon footprint is comparable to other proposed green hydrogen technologies powered by renewable sources like solar and wind energy. The estimated cost of producing hydrogen through this method is around $9 per kilogram, making it competitive with prices from alternative green technologies. The team envisions a production chain that begins with scrap aluminum sourced from recycling centers, emphasizing the significance of utilizing recycled materials to reduce emissions. This innovative approach offers a promising pathway for deploying low-emission hydrogen in transportation and remote energy systems, contributing to sustainable energy practices.