What disadvantages have humans brought to the ocean?

The disadvantages brought by human beings to the ocean:

First, overfishing and marine biodiversity are essential to human survival, but it is facing increasing dangers, and the depletion of fishing grounds is one of the most concerned issues.

The second is the pollution of human activities to the ocean and the harm to marine life.

Substances or energy that directly or indirectly enter the marine environment due to human activities and may have harmful effects. People can pollute the ocean by discharging pollutants at sea and coastal areas, and pollutants dumped in inland areas can also enter the ocean through atmospheric transportation and river transportation. Man-made pollutants accumulated in the ocean are not only of many kinds and quantities, but also of far-reaching harm.