AP Photo/Toshifumi Kitamura
President Barack Obama smiles upon arrival for the Summit on Climate Change at the United Nations Tuesday, Sept. 22, 2009.
AP Photo/Toshifumi Kitamura
Secretary of State Hillary Rodham Clinton waves upon arrival for the Summit on Climate Change at the United Nations Tuesday, Sept. 22, 2009.
AP Photo/David Karp
Former Vice President Al Gore enters a press conference during a climate change summit, Tuesday, Sept. 22, 2009, at the United Nations headquarters.
AP Photo/Mary Altaffer
Oscar-nominated actor Djimon Hounsou speaks during a news conference, Tuesday, Sept. 22, 2009, at United Nations headquarters.
AP Photo/Seth Wenig
French President Nicolas Sarkozy speaks at the summit on climate change at the United Nations headquarters in New York Tuesday, Sept. 22, 2009.
AP Photo/Richard Drew
U.N. Secretary General Ban Ki-moon, above, applauds as Japanese Prime Minister Yukio Hatoyama addresses the summit on climate change at the United Nations, Tuesday, Sept. 22, 2009.
AP Photo/David Karp
Australian Prime Minister Kevin Rudd, left, and South Korean President Lee Myung-Bak chair a discussion on climate change during a climate change summit, Tuesday, Sept. 22, 2009, at the United Nations headquarters.
AP Photo/David Karp
Finland President Tarja Halonen, left, and Kuwaiti Prime Minister Sheikh Nasser Mohammed Al-Ahmed Al-Sabeh chair a discussion on climate change during a climate change summit, Tuesday, Sept. 22, 2009, at the United Nations headquarters.
AP Photo/Mary Altaffer
Former Vice President Al Gore speaks during a press conference, Tuesday, Sept. 22, 2009, at United Nations headquarters.
AP Photo/Mary Altaffer
Former Vice President Al Gore, left, listens as Prime Minister of Denmark Lars Lokke Rasmussen speaks during a press conference, Tuesday, Sept. 22, 2009, at United Nations headquarters.
AP Photo/Seth Wenig
Chinese President Hu Jintao addresses the summit on climate change at the United Nations headquarters Tuesday, Sept. 22, 2009.
AP Photo/Charles Dharapak
Secretary of State Hillary Rodham Clinton, left, and United States Ambassador to the U.N. Susan Rice wait for President Barack Obama's address during the Summit on Climate Change, Tuesday, Sept. 22, 2009, at the United Nations.
AP Photo/Richard Drew
President Barack Obama approaches the podium to address the Summit on Climate Change at the United Nations, Tuesday, Sept. 22, 2009.
AP Photo/Seth Wenig
President Barack Obama speaks at the summit on climate change at the United Nations in New York on Tuesday, Sept. 22, 2009.
AP Photo/Richard Drew
President Barack Obama, below, shakes hands with U.N. Scretary General Ban Ki-moon after he addressed the summit on climate change at the United Nations, Tuesday, Sept. 22, 2009.
