Black, R., Smith, C., Kniveton, D., & Schmidt-Verkerk, K. (2010). Climate change and migration: Improving methodologies to estimate flows. IOM Migration Research, Vol. 33. Geneva: IOM. www.humanitarianinfo.org/IASC/downloaddoc.aspx?docId=4358 This paper is concerned with the question of trying to further the understanding of how different types of shocks and stresses caused by climate change influence different types of migration. The relationship between climate change and migration is currently a topic of great interest as the ongoing environmental refugee debate demonstrates. Proponents of the concept of environmental refugees argue that climate change will increase the severity and the frequency of extreme weather events, which will in turn cause the displacement of the majority of the population of affected areas. As a consequence, hundreds of millions of environmental refugees from vulnerable regions all over the world are expected to seek refuge in wealthier countries.