Question

Under natural conditions, oceans are _____.

self-cleaning systems
ideal waste-dumping grounds
of no use to humans
most damaged by air pollution

Answer 1

I believe the answer is that under natural conditions oceans are self-cleaning systems.

Answer 2

Under natural conditions, oceans are self-cleaning systems.

Step-by-step explanation:

• The oceans usually do not house any waste, unwanted material in themselves.

• The ocean waves either dispose off the waste material back on the shores, or the saline ocean water decays the degradable material.

• The marine organisms are also majorly responsible for keeping the oceans clean. These animals eat up edible waste and control pollution in the oceans.

• The lavas erupting at the bottoms of the oceans burn up the nearby non-biodegradable material.

• Thus, in natural conditions, oceans are self-cleaning systems.