In the Pacific Ocean, there is a vortex of ocean currents that occupies an area of approximately 10 million square miles (26 million sq km). Called the North Pacific Gyre, it has a relatively stationary center whose circular rotation draws in waste material, leading to a massive, floating accumulation of debris known as the Great Pacific Garbage Patch. Though such debris has historically been biodegradable, the gyre is now accumulating vast quantities of plastics, which break down into what? Discuss
Source: The Free Dictionary