European Commission Vice-President Vera Jourova has said that those responsible for the ecological disaster in the River Odra will have to pay.
Andrzej Duda, the Polish president, has said the environmental disaster on the River Odra which killed thousands of fish was probably the result of both an act of nature and human activity.
Poland's ruling United Right coalition has seen support fall owing to the ecological disaster on the River Odra, Poland's second longest river, a new opinion poll has shown.
With climate change meaning hotter summers and low levels of water in one of Poland's biggest rivers, experts say that it was only a matter of time before something happened.
The Polish prime minister has said the environmental disaster on the River Odra that resulted in the death of thousands of fish was an act of nature.
A group of scientists has appealed to the government for a new river management policy to prevent a repeat of the environmental disaster that has affected the River Odra.
The government has adopted a bill introducing aid for businesses affected by the environmental disaster on the River Odra, a government official said on Wednesday.
The River Odra ecological disaster could have been prevented if key individuals such as the prime minister had not been "on vacation", a leading opposition politician claimed on Wednesday.
The Polish government plans to offer financial support to businesses affected by the environmental disaster that hit the Odra, Poland's second largest river, the family and social policy minister has said.
More than 200 tonnes of dead fish have been removed from Poland's second longest river since the River Odra's pollution issue first came to light in late July.