More than half of humanity lives in cities – and the trend is rising. Cities are clearly the living space of the future. And yet our most important resource, the air we breathe, is in many places so polluted that breathing is harming our health. In the future we have in mind, fresh air in urban areas is available to everyone. That’s why we’ve developed the world’s first bio-tech filter to quantifiably improve air quality: The CityTree.

Research teams and studies indicate a clear correlation between fine dust pollution and higher mortality rates of Covid-19. Cardiovascular or respiratory diseases caused by fine dust increase the risk of heavy Covid-19 diseases enormously. According to a comprehensive study by the Max Planck Institute air pollution could be a co-factor in 26 percent of Covid-19 deaths in Germany. Worldwide, they put the proportion at an average of 15 percent