Former U.S. Vice President Al Gore (L) speaks as Prime Minister of Denmark Lars Lokke Rasmussen listens during a news conference to brief UN leadership on climate change at the United Nations headquarters in New York September 22, 2009. Reuters Pictures logo Reuters Pictures 29 months ago

Former U.S. Vice President Al Gore (L) speaks as Prime Minister of Denmark Lars Lokke Rasmussen listens during a news conference to brief UN leadership on climate change at the United Nations headquarters in New York September 22, 2009.