There's Gold In Them Thar Sewage Pipes, Swiss Researchers Say

Each year, more than $3 million in gold and silver wind up in Swiss wastewater, scientists found. But in most cases, it doesn't make economic sense to extract and recycle the metals.(Image credit: Elke Suess/Eawag)

Source: NPR Health and Science - October 11, 2017 Category: Consumer Health News Authors: Camila Domonoske Source Type: news