Stream in Baltimore, Md. (image) Cary Institute of Ecosystem Studies Share Print E-Mail Caption As part of the Baltimore Ecosystem Study, researchers collect stream samples to assess pharmaceutical pollution. Credit photo credit: Sylvia Lee Usage Restrictions To promote this press release. Share Print E-Mail 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.