Wetlands (IMAGE) DOE/Oak Ridge National Laboratory Caption Coastal wetlands are just one of dozens of environments where scientists found genes that transform mercury into the neurotoxin methylmercury. Credit Photo courtesy of Smithsonian Environmental Research Center/Grace Schwartz 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.