Your poop is literally a gold mine

Instead of flushing millions down the toilet, humans could be mining their poop for gold. That's at least what some researchers with the U.S. Geological Survey (USGS) think. They're looking for ways to squeeze metals like gold and silver out of solid waste. SEE ALSO: The poop on pooping: 5 misconceptions explained When poop arrives at a wastewater treatment plant, it is separated into biosolids and treated water. Inevitably about half of the biosolids (3.5 million tons in the United States alone...