Building Sustainability in an Urbanizing World: A Partnership Report

The report summarizes the sustainability issues faced by cities and points toward the road ahead. It reviews successes in policy as well as investment and discusses what is needed to reach out to the rapidly growing cities of the developing world and make them effective users of existing knowledge. 

The World Bank
http://www.worldbank.org/en/topic/urbandevelopment/publication/building-sustainability-urbanizing-world