1. United Nations World Population Prospects: 2009 Revision (UN Department of Economic and Social Affairs, 2009).
2. Parry, M. L. et al. (eds) Climate Change 2007: Impacts, Adaptation and Vulnerability. Contribution of Working Group II to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (Cambridge Univ. Press, 2007).
3. Rosenzweig, C., Solecki, W., Hammer, S. & Mehrotra, S. Climate Change and Cities: First Assessment Report of the Urban Climate Change Research Network (Cambridge Univ. Press, 2011).
4. Rosenzweig, C. & Solecki, W. (eds) Ann. NY Acad.Sci. 1196, 1–354 (2010).
5. Mehrotra, S. et al. Framework for City Climate Risk Assessment (World Bank, 2009); available at
http://go.nature.com/t2zbrA