Nationwide study shows how manufacturing facilities can increase levels of medical compounds in waterways.
Researchers found that efforts to curtail tourism-related emissions have been outpaced by the industry's growth.
Ambitious plan aims to keep waste out of rivers without massive new pipes.
Scientists are developing a "living sensor" that eats hydrocarbons to monitor the country's extensive network of petroleum pipelines.
Scientists discuss the risks and feasibility of using solar geoengineering to cool us off.
Fish expend energy metabolizing drugs and personal products in fresh water.
Nitrogen isotopes show how nutrients leach out of septic tanks and into pond ecosystems.