A Cornell University-led research team has developed a groundbreaking method to generate green hydrogen by using a small hybrid solar distillation-water electrolysis device to electrolyze seawater, a process that also yields potable water. The prototype, measuring just 4 inches per side, can produce 200 milliliters of hydrogen per hour with an energy efficiency of 12.6%. Scaling up this technology could potentially bring down the cost of green hydrogen to $1 per kilogram in the next 15 years, offering a significant advancement in green fuel production. Notably, this approach addresses both the need for energy and the global water scarcity crisis. By harnessing wasted heat from solar cells to warm seawater without affecting electricity generation, the team maximizes the sun's energy potential. The integration of desalination, electrolysis, and solar panels in one device offers a multifaceted solution that not only produces green hydrogen efficiently but also provides potable water, crucial for regions facing water scarcity. The technology's innovative design allows for the simultaneous production of water for human consumption and hydrogen, showcasing a sustainable and cost-effective solution to meet growing energy demands and freshwater needs. Additionally, the device shows promise in potentially cooling photovoltaic panels, enhancing their efficiency and lifespan. By combining environmental sustainability, technological innovation, and energy efficiency, this novel approach paves the way for a more sustainable future with reduced carbon emissions, cleaner energy production, and improved water accessibility.