The diversity of the selected case studies offer the reader the opportunity to gain a thorough understanding of how sustainability developments have unfolded in different city regions. Case study-specific catalogues of transition paths provide insights to inform policy debates and planning processes. The catalogues identify crucial innovations (technological, regulatory, etc.) and explain the factors and circumstances that have led to their success and broader acceptance in Freiburg, Vancouver, Luxembourg, and Brisbane. With the help of a number of micro case studies within each of the four city regions, the case studies also offer ground for comparison and identification of differences. 

The book represents the outcome of the GreenRegio project, which stands for 'Green building in regional strategies for sustainability: multi-actor governance and innovative building technologies in Europe, Australia, and Canada.' GreenRegio was a 3-year CORE-INTER research project funded by the National Research Fund Luxembourg (FNR) and the German Research Foundation (DFG).