The Working Group III (WG III) of the Intergovernmental Panel on Climate Change (IPCC) focuses its work on the mitigation of climate change. Like the other two working groups of the IPCC, WG III is currently preparing its contribution to the 5th Assessment Report (AR5) to be published in 2014. In order to advance this work, WGIII will hold its Fourth Lead Author Meeting (LAM4) in Addis Ababa, Ethiopia from 1 to 5 July 2013.LAM4 will be hosted by the African Climate Policy Centre (ACPC), a centre of the United Nations Economic Commission for Africa (ECA).The second order draft of the WG III contribution has been finalized and reviewed by governments and registered experts. In Addis Ababa, the author teams meet to discuss how to consider the approximately 20,000 comments received with a view to completing the final draft. According to the timetable agreed by the IPCC at its 32st Session in Busan, Republic of Korea, in October 2009, the Working Group III contribution to the AR5, Climate Change 2014: Mitigation of Climate Change, will be released in April 2014.A scoping meeting to outline the AR5 was held 13-17 July 2009 in Venice, Italy. Invited experts from governments and academia discussed and developed the scope and table of contents for the three Working Groups contributions to the AR5. They also identified major issues of integration and synthesis.During its 9th Session (26-27 October 2009), the IPCC WGIII finalized and approved the chapter outlines of the WGIII contribution to the AR5. The WGIII outline, as well as those for Working Groups I and II, was then accepted by the 31st Session of the IPCC on 29 October 2009 in Bali, IndonesiaStarting in January 2010, governments and participating organizations have been asked to nominate experts to act as authors and reviewers for the three Working Group contributions to the AR5. Authors have been selected by the IPCC Working Group Bureaus, under general guidance and review provided by the Session of the Working Group, as stipulated in the IPCC procedures and have been noted by the Bureau at its 41st session in 19-20 May 2010 in Geneva. The writing process started in the second half of 2010 for Working Group I and in early 2011 for Working Groups II and III.In addition to meetings of Lead Authors for the AR5, a number of expert meetings and workshops have been held to broaden the basis for the assessment, for instance to address cross-cutting matters. For instance in March 2011, the Working Groups II and III organized an expert meeting on mitigation and adaptation strategies for human settlements and infrastructurein Calcutta, India.