Berlin — A river on the German-Polish border has become a mass grave. Volunteers and authorities have been busy for days removing tons of dead fish floating on the surface of the Oder River. The cause ...

Two years after a major fish die off in the Oder River, Poland is again battling algae blooms, this time with hydrogen peroxide. As rising pollution and temperatures fuel their growth worldwide, ...

Despite bureaucratic and financial challenges, environmentalists in Germany and Poland are joining forces to protect the biodiverse Oder River ecosystem. Stefanie and Norbert Bartel's farm in eastern ...