FILE - In this Nov. 14, 2012 file photo, protesters wearing flower costumes, display placards during a rally near the U.S. Embassy in Manila, Philippines to call on industrialized countries to act on the growing problem of climate change. Slowing the buildup of greenhouse gases responsible for warming the planet is one of the biggest challenges the U.S. _ and President Barack Obama _ faces. The impacts of rising global temperatures are widespread and costly: more severe storms, rising seas, species extinctions, and changes in weather patterns that will alter food production and the spread of disease. (AP Photo/Bullit Marquez, File)

Associated Press
FILE - In this Nov. 14, 2012 file photo, protesters wearing flower costumes, display placards during a rally near the U.S. Embassy in Manila, Philippines to call on industrialized countries to act on the growing problem of climate change. Slowing the buildup of greenhouse gases responsible for warming the planet is one of the biggest challenges the U.S. _ and President Barack Obama _ faces. The impacts of rising global temperatures are widespread and costly: more severe storms, rising seas, species extinctions, and changes in weather patterns that will alter food production and the spread of disease. (AP Photo/Bullit Marquez, File)
FILE - In this Nov. 14, 2012 file photo, protesters wearing flower costumes, display placards during a rally near the U.S. Embassy in Manila, Philippines to call on industrialized countries to act on the growing problem of climate change. Slowing the buildup of greenhouse gases responsible for warming the planet is one of the biggest challenges the U.S. _ and President Barack Obama _ faces. The impacts of rising global temperatures are widespread and costly: more severe storms, rising seas, species extinctions, and changes in weather patterns that will alter food production and the spread of disease. (AP Photo/Bullit Marquez, File)
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