The concentration of oxygen in the lower layers of the waters of the Gulf of Oman declined sharply in recent years, which created a giant dead spot near its bottom.
Areas of oceans with a low oxygen content, the so-called death zones, are formed as a result of pollution of water with fertilizers and industrial wastes. The ingress of nitrates and other compounds into the rivers and then to the coastal regions of the sea leads to a rapid multiplication of unicellular algae in the ocean, the death and decomposition of which in the water column absorbs most of the oxygen. Most animals do not survive in such conditions… (read more)
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