A team led by Cornell University has developed a groundbreaking system called HSD-WE that can produce green hydrogen and drinking water directly from seawater using solar power. The innovative device represents a fusion of energy sustainability and clean water access. Involved in the research are scientists from MIT, Johns Hopkins University, and Michigan State University. The prototype has a small footprint of 10 cm² and can generate 200 milliliters of hydrogen per hour with an energy efficiency of 12.6% using natural sunlight. The technology aims to significantly reduce the cost of green hydrogen production to approximately $1 per kilo within the next 15 years, contributing to the global transition to clean energy and zero liquid emissions by 2050. By utilizing seawater and solar energy, the system not only produces clean hydrogen but also addresses the pressing issue of drinking water scarcity globally. The breakthrough innovation efficiently utilizes almost all captured solar energy, leveraging seawater's abundance and the heat from conventional photovoltaic cells to heat water, inducing evaporation. This condensed water vapor is then sent to an electrolyzer to separate hydrogen from oxygen. This dual-purpose system is hailed by Professor Lenan Zhang for addressing the intertwined challenges of clean energy demand and water access, breaking the traditional exchange cycle between energy and water. Additionally, the technology offers the potential to cool solar panels with seawater, extending their lifespan and efficiency. The project's lead, Professor Lenan Zhang, emphasizes the technology's potential for large-scale adoption due to its low carbon emissions and affordability. The system's innovative approach to hydrogen production and water generation marks a significant step towards sustainable energy practices.