Effective global response to climate change requires the development and transfer of environmentally sound technologies between and within countries, both for adapting to climate change as well as for mitigating the effects of greenhouse gas emissions. This Special Report of the Intergovernmental Panel on Climate Change (IPCC) offers a state-of-the-art overview of how to achieve and enhance this transfer. 185 eminent experts from around the world provide accurate, unbiased, policy-relevant information on technology transfer, such as capacity building, the promotion of an enabling environment, and mechanisms for technology transfer from developed to developing countries. This IPCC volume is the most comprehensive assessment available on technology transfer for policymakers in industry and environmental organizations, and researchers in global change, technology, engineering, and economics.