A demonstrator gestures outside the venue of United Nations Climate Change Conference in Cancun, Mexico, on Nov. 30, 2010. Photo: AP
U.N. climate chief Christiana Figueres places a building block in a miniature Mayan pyramid at the site of climate negotiations in Cancun, Mexico, on Nov. 28, 2010. The "Pyramid of Hope" monument was erected to symbolise the many building blocks needed for a new climate agreement. Photo: AP
Children sit next to a giant bottle displaying a message inside it, in Cancun, Mexico, on Nov. 28, 2010. Photo: AP
Mexico's President Felipe Calderon, left, presses the button to start a wind turbine during the United Nations Climate Change Conference in Cancun, Mexico, on Nov. 28, 2010. Photo: AP
Mexico's Nobel Chemistry Prize laureate Mario Molina delivers a speech during the opening ceremony of the United Nations Climate Change Conference in Cancun, Mexico, on Nov. 29, 2010. Photo: AP
A demonstrator holds a banner during a march against Mexico's environmental policies in Mexico City, on Nov. 30, 2010. Photo: AP
An aerostatics balloon of the environmental group Greenpeace is seen next to the Mayan ruins of Chichen Itza in Mexico, on Nov. 28, 2010. Photo: AP
A protester stands outside the venue of U.N. Climate Change Conference in Cancun, Mexico, on Nov. 30 , 2010. Photo: AP
Rajendra Pachauri, Chairman of the Intergovernmental Panel on Climate Change, smiles during an interview in Cancun, Mexico, on Nov. 30, 2010. Photo: AP