Rajendra Kumar Pachauri, chairman of the Intergovernmental Panel on Climate Change who accepted the 2007 Nobel Peace Prize on behalf of the organisation, talks with Climate-Change.tv about work on the IPCC’s in-progress Fifth Assessment Report, the IPCC’s 20-year history, and why he feels optimistic about the international climate change process despite slow progress on the negotiations front. Also see Rajendra Kumar Pachauri speaking from Poznan in 2008 and read his foreword in RTCC. Also see Kenyan delegate Grace Akumu, a key member of the Africa Group, speaking from Barcelona in 2009.