rivers are the most polluted in the world.
Estonia have the dirtiest coastal waters.
The Sarno (Italy) is the most polluted river in Europe
Mercury comes through air pollution from industrial plants. In the water, the elemental mercury is converted to methylmercury by certain bacteria, after which it moves into food through a fish.
Young children and fetuses (плод) are most at risk because their systems are still developing.
Mercury causes neurological problems, including slower reflexes, learning deficits, delayed or incomplete mental development, autism, and brain damage.
Mercury for adults is also a problem, causing:
central nervous system effects like Parkinson's disease, multiple sclerosis, and Alzheimer's disease (разновидность пресенильного слабоумия);
death or irreversibly damaging areas of the brain.