Poland rules out toxic substances behind mass fish die-off in Oder River
epa10122064 A flexible dam is deployed as part of the cleaning operation of the Oder River after thousands of dead fish washed up on the river banks, in Krajnik Dolny village, Poland, 15 August 2022. The Oder river is suffering from an environmental disaster after over 10 tons of dead fish were spotted floating in its waters since July, although no toxic substances were detected, Poland's climate and environment minister said. The exact cause of the mass fish die-off, which was labeled as an 'ecological disaster,' remains unclear. EPA/Marcin Bielecki POLAND OUT
