DEUS Pollutrack Smart City GmbH, a pioneer for Green Tech Partnerships, is operating the largest connected environmental data platform in Europe, providing an indispensable contribution to environmental justice in urban areas. The self-recalibrating monitoring network consists of mobile and stationary sensors, measuring ultrafine particulate matter, Nitrogen Dioxide (NO2), weather, traffic, and noise to localize hotspots that threaten human health and the environment. The specialized information system and a 24-hour forecasting system is funded by the German Federal Ministry of Transport and Digital Infrastructure via the mFUND with more than 4 million Euros.