Answer :

Scientists discover that fish have abnormally high levels of lead in their bodies. Ocean dumping type of waste disposal most likely caused this phenomenon

This is further explained below.

What is Ocean dumping?

Generally, The intentional discharge of hazardous materials at sea from boats, airplanes, platforms or other man-made structures is known as ocean dumping. It comprises disposal into the seabed and sub-seabed as well as ocean incineration.

In conclusion, Researchers have made the startling discovery that some species of fish have extremely high lead content in their bodies. Ocean dumping type of waste disposal most likely caused this phenomenon

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