Nature and EnvironmentFranceAn algae plague in BrittanyTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoNature and EnvironmentFrance09/09/2021September 9, 2021Layers of algae up to 40 centimeters thick are posing a serious public health hazard. The substance releases highly toxic hydrogen sulfide as it decomposes.https://p.dw.com/p/3zzC6Advertisement