Researchers in Australia have unveiled groundbreaking systems that leverage urea from urine and wastewater to produce green hydrogen, a sustainable and renewable energy source with significant environmental benefits. Traditional hydrogen production through electrolysis of water is energy-intensive and costly, prompting the exploration of alternative sources like urea. While previous urea-based systems faced challenges such as low hydrogen extraction and toxic by-product generation, the new systems developed by the Australian Research Council Centre of Excellence for Carbon Science and Innovation (COE-CSI) overcome these limitations. By using urine as a more accessible and cost-effective source of urea, the systems can generate green hydrogen at a comparable or lower cost than grey hydrogen production. The innovative membrane-free urea electrolysis systems produce harmless nitrogen gas instead of toxic by-products, improving overall efficiency. The research, published in respected scientific journals, highlights the potential of these systems to transform hydrogen production and wastewater treatment practices. Future endeavors aim to develop non-precious metal catalysts to enhance the cost-effectiveness and sustainability of green hydrogen production from urine and wastewater, contributing to a greener and more efficient energy landscape.