The Biopolus Institute is a privately owned nonprofit research and development organization based in Budapest, Hungary. The primary focus area of the Institute is the development of integrated smart nature-based technologies and solutions for improving the circularity, efficiency, and climate resiliency of cities. Biopolus urban planning and consulting integrates existing infrastructure with high-tech urban circularity infrastructure and NBS-nature-based solutions for beautiful, climate-resilient sustainable cities. Biopolus has developed a range of its own technologies and solutions for addressing the typical challenges of a circular and resilient economy. These developments range from innovative nature-based water treatment technologies to biological production systems and urban farming methodologies. The solutions are based upon the principle of water-based urban circularity, where energy, food, and waste systems are built around a regenerative and sustainable water cycle. Biopolus Institute is working together with several international partners to develop intelligent water, energy, waste management and biological production systems that make the operation of cities cheaper, safer and more efficient.