This report defines sprawl and its alternative, “smart growth,” describes various costs and benefits of sprawl, and estimates their magnitude. It identifies policy distortions that encourage sprawl and discusses factors to consider when determining the optimal amount and type of urban expansion for various types of cities. 

Countries at all income levels have the opportunity to build lasting economic growth and at the same time reduce the immense risk of climate change. But action is needed now. The Global Commission, advised by some of the world’s leading economists, sets out a ten point Global Action Plan for governments and businesses to secure better growth in a low-carbon economy.