ReGreeneration is a Horizon project dedicated to shaping the future of green and inclusive smart cities. It involves four leading cities across Europe, Bucharest, Paris, Alverca, and Barcelona pioneering the implementation of nature-based solutions in diverse urban environments. These projects will then be replicated in other European cities: Roma, Ghent, Ljubljana, Segrate, and Lappeenranta.

The project's primary objectives encompass demonstrating the positive impact of nature-based solutions on mitigating urban climate change while improving urban living conditions. It also seeks to actively engage citizens, raise awareness, and promote long-term social compromise. Moreover, the initiative aims to empower municipalities to work towards climate neutrality and develop smart digital city models that enhance visualization of current and future city-states (including climate change, social aspects, air quality, and pollution).