Photo 1 (image) Helmholtz Centre for Environmental Research - UFZ Share Print E-Mail Caption The Danube is Europe's second largest river and is used intensively by people. It is one of six rivers that formed the focus of the EU project SOLUTIONS. Credit UFZ/André Künzelmann Usage Restrictions None 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.