Final answer:
Supertanker oil spills are the foremost source of oil pollution in oceans, causing catastrophic impacts on marine ecosystems.
Explanation:
Supertanker oil spills are the largest source of oil pollution in the ocean, causing catastrophic impacts on marine ecosystems. For example, the Deepwater Horizon disaster released an estimated 200 million gallons of oil into the Gulf of Mexico in 2010, affecting wildlife and coastal areas.
Improper disposal of used oil after routine oil changes also contributes to oil pollution but on a smaller scale compared to major oil spills from tankers or drilling accidents.
Natural oil seepages also occur but are slower and have less severe impacts as the ecosystem adapts to them over time.
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