Stinkin’ rich
Sewage sludge carries loads of valuable metals

MONEY FLUSH Millions of dollars’ worth of gold, silver and other expensive elements swirl down the drain and into sewage treatment plants.
© jgroup/iStock
Sewage sludge carries loads of valuable metals
MONEY FLUSH Millions of dollars’ worth of gold, silver and other expensive elements swirl down the drain and into sewage treatment plants.
© jgroup/iStock