Green to Scale is a series of analysis projects that have highlighted the potential of scaling up existing climate solutions. Nordic Green to Scale for Cities and Communities analyses proven climate solutions from Nordic cities and municipalities. This report presents the emission reduction potential of 14 selected solutions. The study highlights the costs, savings and co-benefits of implementing the solutions as well as makes policy recommendations for capturing the potential. The project was carried out by the Finnish Innovation Fund Sitra, together with its partners CICERO, CONCITO, Stockholm Environment Institute, Institute of Sustainability Studies at the University of Iceland and C40 Cities. The project is part of the Nordic Council of Ministers’ Prime Ministers’ Initiative Nordic Solutions to Global Challenges.