Workers build the Baoying Pumping Station in Yangzhou in China's eastern Jiangsu province in this April 8, 2004 file photo. As liquidity is drained from credit and money markets and pours into oil and gold, another asset class that could offer longer-term returns to the discerning investor is water. Picture taken April 8, 2004. REUTERS/Claro Cortes IV/Files (CHINA) To match feature WATER-TECHNOLOGY
REUTERS/CLARO CORTES IV