Samples obtained from ocean troughs, one of the most difficult regions to collect samples on the earth, were later examined in laboratories.
Professor Hamed Sanei, leader of the research team, noted that the amount of mercury discovered in this area was greater than the amount detected so far in any of the distant marine sediments.
Sanei also pointed out that the pollution level is even higher than in many areas directly contaminated by industrial emissions.
The scientists said that the discovered mercury accumulation may have been caused by the waste, and that they expect the tectonic movements on the ocean floor to carry the accumulation in deep pits deep into the earth’s layer.
The researchers highlighted that even if a long tectonic clearing takes place, the accumulated mercury will continue to worry about the state of the oceans.