Green City Solutions, co-founded by Liang Wu, is a biotech startup in Bestensee, Germany, that tackles urban air pollution by integrating moss with IoT technology to create biofilters. These biofilters utilize the natural air-purifying properties of moss, which binds and metabolizes air pollutants, and are optimized through sensors and IoT to maintain ideal growth and filtration conditions. Grafana dashboards play a crucial role in visualizing and managing data from these biofilters across various European cities, enabling real-time monitoring and analysis of environmental conditions and system performance. This technology not only supports the efficient management of the company's moss farm near Berlin but also provides customers, including major companies and cities, with insights into air quality improvements and pollution reduction. Green City Solutions aims to significantly impact air pollution by removing substantial amounts of carbon dioxide and other pollutants from the atmosphere by 2030.