Minija-4 Radio Set and Tape Recorder, USSR (1966)
Made by Kaunas Radio Factory, Lithuania.
More photos: http://www.rw6ase.narod.ru/000/mg/minija4.html
The eutrophication of the Potomac River is evident from the bright green water, caused by a dense bloom of cyanobacteria. Eutrophication, is the ecosystem response to the addition of artificial or natural substances, mainly phosphates, through detergents, fertilizers, or sewage, to an aquatic system.Eutrophication is extremely costly to society and recovery from eutrophication has been estimated to take a thousand years.