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PBS News Hour
How sand mining is threatening Cambodia's Mekong River
Sand mining accounts for 85 percent of all worldwide mineral extraction, a $70 billion industry. In Cambodia, the practice is big business -- but it comes with a price. The country relies upon the Mekong River for commerce and transportation, but extensive dredging to harvest sand is fundamentally changing its ecosystem and eroding its banks. Special correspondent Fred de Sam Lazaro reports.
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