Experts puzzled by disappearing fish
The Birs river in canton Bern was always full of fish - and particularly trout - but now there's a problem. Recently, hardly any fish have been seen in a two kilometre section of the river. Thousands of creatures have disappeared. Fishermen and the authorities are puzzled. (SRF/swissinfo.ch)
You can find an overview of ongoing debates with our journalists here. Please join us!
If you want to start a conversation about a topic raised in this article or want to report factual errors, email us at english@swissinfo.ch.