Green City Solutions

Green City Solutions GmbH is a German environmental technology company that develops CityBreeze, a smart-city media unit combining a moss-based air biofilter with a large digital out-of-home advertising screen. Founded in Germany and headquartered in Bestensee near Berlin, the company positions its products at the intersection of clean-air infrastructure and place-based digital media. Each CityBreeze installation pairs a vertical moss wall, monitored by integrated sensors, with an illuminated screen that carries advertising, public information and air-quality data, giving cities, retailers and brands a way to fund green infrastructure through sponsorship and DOOH campaigns.

According to the company, its regenerative biofilters process large volumes of air, reduce fine dust by up to 82 percent, cut carbon-equivalent emissions and lower surrounding temperatures by up to four degrees Celsius. The advertising screen turns each unit into a revenue-generating place-based medium, typically sited in high-footfall locations such as shopping centres, transport hubs, plazas and public buildings. Green City Solutions handles the design, manufacture, installation and ongoing maintenance of its units, and its sensor platform lets operators monitor moss health and optimise performance remotely.

Installations documented on the company site span numerous German cities including Berlin, Leipzig, Bremen and Wilhelmshaven, with further deployments internationally. By merging measurable environmental benefit with digital signage, the company offers advertisers and municipalities a distinctive sustainability-led DOOH format that differentiates it from conventional billboard and street-furniture media across urban markets.