In this Aug. 2, 2011 photo, the AZ Kunming Singapore, registered in the island republic, is towed empty to be filled at a sand depot in southwestern Cambodia where mining has caused environmental ... more 
In this Aug. 2, 2011 photo, the AZ Kunming Singapore, registered in the island republic, is towed empty to be filled at a sand depot in southwestern Cambodia where mining has caused environmental damage. The bulk of the sand is destined for Singapore, among the world's top importers, where it is used for land reclamation projects and construction. (AP Photo/Heng Sinith) less 
1 / 1
Associated Press | Photo By Heng Sinith
Sun, Aug 21, 2011 9:42 AM EDT