"BERLIN — Several substances seem to have contributed to the massive fish die-off in the Oder River that forms much of Germany’s border with Poland, a German official said Monday.

Numerous theories have been floated about the cause of the environmental disaster, but so far none have been conclusive, a spokesman for Germany’s Environment Ministry said. He rejected suggestions from a senior Polish official that Germany was spreading “fake news” about pesticides being behind the environmental disaster.

“The search for the causes of the fish die-off in the Oder still haven’t been completed,” said Andreas Kuebler, the ministry spokesman. “So far we have several organic and inorganic substances that could be responsible.”

“It seems to be a cocktail of chemicals,” he told reporters in Berlin. “According to our information so far, none of these substances alone led to the fish die-off. It must still be assumed that this could be a multi-causal incident.”"

Frank Jordans reports for the Associated Press August 22, 2022. [2]