This is an evaluation of estimates of the costs of adaptation made by the United NationsFramework Convention on Climate Change (UNFCCC) in 2007 and by some preceding studies(UNFCCC, 2007; Stern, 2006; World Bank, 2006; Oxfam, 2007; UNDP, 2007). The costs havebeen used as the basis for discussion regarding the...

Several recent studies have reported the costs of adapting to climate change, including for developing countries. They have similar-sized estimates and have been influential in United Nations (UN) negotiations aimed at tackling climate change. Our reassessment of one of these studies, which...

This paper describes the gaps and limitations in the data available on urban populations for many low- and middle-income nations and how this limits the accuracy of international comparisons - for instance of levels of urbanization and of the size of city populations. It also discusses how the...

The impacts of climate change are expected to create numerous challenges for cities. This report synthesizes key points raised in a series of discussions among “adaptation leaders” from fourteen cities around the world. Critical issues for urban adaptation that emerged from the discussions...