Almost half of Black Sea has become uninhabitable?

For half a century, 40 percent of the Black Sea was uninhabitable, found scientists from the University of Liège, in Belgium.

This is due to the fact that the layer of sea water saturated with oxygen, since 1955, is becoming thinner, whereas the concentration of phosphorus and nitrogen in the sea is increasing, according to Biogeosciences journal.

As it turned out, the distance between this boundary and the surface of the water for interested researchers of the period was reduced from 140 to 90 meters.

This means that about 40 percent of the previously habitable waters of the Black Sea are not more – that the upper layers contain the oxygen necessary for underwater life.

Researchers believe that this may be related to global warming, as well as water quality deterioration due to the fact that a large number of compounds of nitrogen and phosphorus have entered the water for decades.

As a result, researchers predict environmental and economic consequences.