Water lettuce clogs a river in Huizhou, South China’s Guangdong province, April 9, 2015. It costs the city more than two million yuan ($320,000) per year to clear the plant from the river. (Photo/CFP)
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Water lettuce clogs a river in Huizhou, South China’s Guangdong province, April 9, 2015. It costs the city more than two million yuan ($320,000) per year to clear the plant from the river. (Photo/CFP)
