U.S. Treasury Secretary Paulson is briefed on advancing desert sand dunes caused by overgrazing and topsoil...
U.S. Treasury Secretary Henry Paulson (R) is briefed on advancing desert sand dunes caused by overgrazing and topsoil erosion at Qinghai Lake in western China July 30, 2007. Paulson stopped at the lake, threatened by global warming, to highlight China's environmental challenges, before visits in Beijing with top government officials. REUTERS/David Lawder (CHINA)