Ecological disaster hits Odra River

Patrick Pleul/PAP

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.

Images of tonnes of dead fish have flooded the Polish news for weeks, but still relatively little is known about what actually caused this disaster.

In the studio host John Beauchamp speaks to environmental geographer Michał Brennek.