ScienceGermanyUndoing damage a dam caused to fishTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoScienceGermany04/30/2021April 30, 2021In the River Dhünn, below the dam, it was too cold for fish to thrive, because the water was drawn from the chilly depths of the reservoir. Now, cosy warm water is drawn from higher up, and fish are coming back.https://p.dw.com/p/3smrKAdvertisement