What killed tons of fish in European river? Mystery deepens
Laboratory tests following a mass die-off of fish in the Oder River detected high levels of salinity but no mercury poisoning its waters, Poland's environment minister said Saturday as the mystery continued as to what killed tons of fish in Central Europe.
- Health
- Published Date: 08:13 | 13 August 2022
- Modified Date: 10:41 | 27 January 2023