Poland is fighting against the spread of the toxic golden algae. Four years after the massive fish die-off in the Oder River, Polish authorities are once again battling toxic algae in a tributary of the river. So far, the fish kill has been confined to a section of the Gliwice Canal. #Poland #AlgalBloom #HAB https://www.deutschlandfunk.de/polen-kaempft-gegen-ausbreitung-der-giftigen-goldalge-102.html