Trulove, Susan2015-10-292015-10-292008-03-13http://hdl.handle.net/10919/60928Streams are natural filters that help remove and transform pollutants that drain from surrounding watersheds, including excess nitrogen from human activities. Scientists know this as a result of many hours of getting their hands - if not dirty, at least very wet - monitoring streams nationwide.text/htmlIn CopyrightCollege of SciencePress releaseVirginia Tech. University Relations