ABSTRACT
Climate change is high on the policy agenda. A growing pool of resources is available to finance climate change interventions. The selection and design of such interventions should be based on existing evidence of what works and what does not, why, and at what cost. "Climate change" or "global warming" refers to the phenomenon of the observed steady increase in the global average temperature. The chapter introduces the issue of climate change, and analyses how the cost effectiveness of climate change interventions. However, it is argues that a full cost-benefit analysis, rooted in a quality impact evaluation, is necessary to capture all costs and benefits and understand why interventions do or do not work. Given the large number of projects undertaken one would expect there to be a systematic inventory of existing climate change projects, describing the intervention, its costs and cost effectiveness.
