Peruvian Mining (IMAGE) Duke University Caption Small-scale, artisanal mining operations such as the one shown here causes deforestation, which in turn leads to erosion that exasperates the release of mercury into the local watershed. Credit Axel Berky, Duke University Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.