In response to a request by the Subsidiary Body for Scientific and Technological Advice (SBSTA), at its twenty-third session, the secretariat organized four workshops in 2006 and 2007, which addressed scientific, technical and socio-economic aspects of mitigation of climate change. The themes of the workshops were: agriculture, forestry and rural development; urban planning and development, including transportation; energy efficiency, including industry, and residential and commercial enduse; and power generation, including clean fossil fuels and renewable energy. This document was prepared in response to a request by the Chair of the SBSTA to the secretariat to provide, prior to SBSTA 27, input for deliberations by Parties based on the information presented by Parties during the mitigation workshops. The document attempts to summarize the information presented during the four workshops that have been organized by the secretariat thus far. The SBSTA may wish to consider the information in this note during its deliberations under this agenda item at its twenty-seventh session