Caption: Protestors bury their heads in the sands with flags illustrating different countries during a climate change summit held in the city of Durban, South Africa, Friday, Dec. 2, 2011. At a time of deep concern over global warming, a group of scientists, philosophers and legal scholars examined whether human intervention could artificially cool the Earth and what would happen if it did. A report discussed Friday at the U.N. climate conference in South Africa said that in theory reflecting a small amount of sunlight back into space before it strike's the Earth's surface would have an immediate and dramatic effect. But no one knows what the side effects would be. (AP Photo/Schalk van Zuydam)
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Photo ID: 39138149
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