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Link: https://sputniknews.com/europe/201710141058241275-swiss-sewers-see-lost-millions/
Researchers testing the waters at sewage treatment plants in Switzerland have discovered salvageable amounts of precious metals, including silver and gold, as well as rare-earth minerals that are continuously flushed into the wealthy country's wastewater networks. 95 pounds of gold — the equivalent of about $1.8 million at current exchange rates — are tossed down the drain annually, particularly in areas where the country's legacy watch-making and refinery industries are located.