"Tarnished Gold: Illegal Amazon Gold Seeps Into Supply Chains"
"To match the festive spirit of South America’s first Olympics, officials from Brazil, the host country for the 2016 games in Rio de Janeiro, boasted that the medals hung around the necks of athletes on the winners’ podium were also a victory for the environment: The gold was produced free of mercury and the silver recycled from thrown away X-ray plates and mirrors."