The 2009 Summit on Climate Change takes place at UN Headquarters, New York, on 22 September and is the largest ever gathering of heads of State and government to discuss what Secretary-General Ban Ki-moon has deemed the "defining challenge of our time". 21 September 2009. UNHQ, New York (USA). UN Photo
UN Secretary-General Ban Ki-moon (centre) opens the Summit on Climate Change while General Assembly President Ali Treki (left) looks on. Convened by Mr. Ban, the Summit aims to mobilize the political will needed to reach a global deal at the December UN climate change conference in Copenhagen. 22 September 2009. UNHQ New York (USA). UN Photo
Secretary-General Ban Ki-moon (centre, front row) poses with speakers - including national leaders and Nobel Prize laureates addressing the Summit on Climate Change. Some 100 heads of State and government are in attendance. [See more] 22 September 2009. UNHQ, New York (USA). UN Photo
Secretary-General Ban Ki-moon greets Barack Obama, President of the United States, as he arrives for his first visit to UN Headquarters to attend the Summit on Climate Change. Mr. Obama is one of eight national leaders to address the opening of the Summit in person, while many others provided taped video messages. 22 September 2009. UNHQ, New York (USA). UN Photo
Academy Award nominee and actor Djimon Hounsou addresses the opening of the UN Summit on Climate Change, reciting from late astronomer Carl Sagan’s Pale Blue Dot.The Summit is taking place 11 weeks prior to the December climate change conference in Copenhagen, where nations aim to wrap up negotiations on a new agreement to curb greenhouse gases. 22 September 2009. UNHQ, New York (USA). UN Photo
Rajendra Pachauri, Chair of the Nobel Peace Prize-winning Intergovernmental Panel on Climate Change (IPCC), addresses the opening session of the Summit on Climate Change. 22 September 2009. UNHQ, New York (USA). UN Photo
Yugratna Srivastava, a 13-year-old girl from India who acts as a youth representative for the UN Environmental Programme (UNEP), addresses the Summit on Climate Change. Last month, the largest-ever youth conference on climate change, organized by UNEP, was held in the Republic of Korea. 22 September 2009. UNHQ, New York (USA). UN Photo
Ethiopian Prime Minister Meles Zenawi (centre) and Michelle Bachelet Jeria (right), President of Chile, co-chair one of four interactive round-table discussions held during the Summit on Climate Change. The event provides an opportunity for world leaders to engage in direct discussions on measures to curb global warming. 22 September 2009. UNHQ, New York (USA). UN Photo
Australian Prime Minister Kevin Rudd (second from left, front row) and Lee Myung-bak (third from left, front row), President of the Republic of Korea, co-chair one of four interactive round-table discussions taking place as part of the Summit on Climate Change. Seated at right is Srgjan Kerim, one of the Secretary-General’s Special Envoys on Climate Change. 22 September 2009. UNHQ, New York (USA)
Wangari Muta Maathai, Nobel Laureate and Founder of the Green Belt Movement in Kenya, addresses the opening plenary session of the Summit on Climate Change. Ms. Maathai is a co-patron of a global campaign to plant seven billion trees, launched in 2006 by the UN Environment Programme (UNEP), which today achieved its goal. 22 September 2009. UNHQ, New York (USA)