Question

what are the reason for ocean pollution​

Answer 1

Answer:

The lack of care on surface water affects all oceans, rivers, and lakes directly, where pollution like agricultural chemicals affect ground water, which eventually makes it to the sea. Causes of pollution include oil (35% from city runoff), agriculture pesticides and fertilizer runoff, garbage misplacement, and mining.

Answer 2

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➽Oil - Oil pollution can come from tankers that have accidents, or from boats that are dry docked and emptied. But surprisingly, over 35% of oil pollution in the ocean comes from oil in the cities and industry runoff, even the sort you see on driveways and roads. This oil is washed away by rain into the sewage system, which lead to rivers and eventually the ocean.

➽Agricultural Chemicals - Pesticides and fertilizer used on crops are another large environmental issue, because again, the rain will wash the chemicals away and push them toward the ocean, which kills marine life, causes eutrophication and algal blooms, or even damages coral reefs.

➽Garbage - Although garbage is not usually dumped into the sea on purpose, boats that are transporting trash will lose trash over the side, or littered trash can often end up in rivers and oceans. Plastic is especially damaging, since it does not degrade quickly and marine animals often mistake it for food. There are now five giant trash patches called gyres in different areas of the ocean.

➽On-shore and off-shore mining - Any mining done near or in the ocean has several different negative effects. Chemicals and oil leak into the water, and mining on the ocean floor causes ground shifts that can open up vents that release additional chemicals.