2021 was a challenging year. The pandemic shook the world economies, including the European Union’s, pushing Member States to implement new instruments to guarantee stability and security.  The 3rd edition of DecarbCities conference will provide a platform to present technical and organizational solutions from and for cities, showing a breadth of approaches to replace existing fossil fuel-based technologies with heating systems that use renewable energies. Let’s define together clear delivery pathways for future-proof urban heating and cooling solutions.