Photo 1 (IMAGE) Helmholtz Centre for Environmental Research - UFZ 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 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.