Green City Solutions GmbH, founded in 2014, is a green technology company that develops moss-based air purification systems for urban environments. Its flagship product, CityBreeze, uses living moss as a biological filter to clean polluted city air, integrating sensor-enabled monitoring to track performance. The company's work sits at the intersection of biology, IoT technology, data science, electronics, and computer science.
Based in Germany and led by Co-Founder and CEO Peter Sänger, the company operates within an interdisciplinary team spanning horticulture, biology, computer science, architecture, and mechanical engineering. The team has received multiple awards for its work. Green City Solutions is internationally oriented and has set a target of providing clean and fresh air to 500 million people by 2030.
The company's technical stack draws on IoT technology, data analytics, electronics, and computer science to monitor and optimise the air purification performance of its biological systems. This combination of natural processes with sensor networks and data-driven insights positions the company at the convergence of urban infrastructure and environmental technology.






