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Associated Press
FILE- In this June 12, 2011 file photo, people walk along the Cordillera Real of the Andes mountains on the outskirts of La Paz, Bolivia. According to the Environmental Defense League, a Bolivian NGO, Bolivia's glaciers along the Cordillera Real, Chacaltaya, Tuni Condorini and Illimani are shrinking in size by more than one meter every year and estimate that the majority of the snow in this area could disappear by 2030. A scientific assessment by the U.N.’s expert panel on climate change warned that rising global temperatures could have an irreversible impact on people and ecosystems as glaciers melt, sea levels rise, heat waves intensify and oceans become warmer and more acidic. (AP Photo/Juan Karita)

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