Final answer:
Garbage patches are widespread environmental issues present in multiple oceans, particularly where currents concentrate plastic and other wastes.
Step-by-step explanation:
Based on the statement, "Similar garbage patches also exist in the Indian Ocean and the North Atlantic," it can be inferred that garbage patches are not unique to one ocean, but are a widespread environmental issue affecting multiple oceans. These garbage patches refer to areas in the ocean where currents and winds have concentrated plastic and other wastes into large clusters. This is indicative of the broader problem of marine pollution and the persistence of non-biodegradable materials in our oceans, which is a consequence of human activities and has serious ecological impacts.