Ocean Garbage Patches and GPGP
Composition of GPGP
~80% of the plastics in the ocean is estimated to come from land-based sources, with the remaining ~20% coming from boats and other marine sources.
Most plastics in the ocean breakup into very small particles called “micro-plastics,” less than five millimeters in length.
A 2018 study found that synthetic fishing nets made up nearly half of the mass of the Great Pacific Garbage Patch, due to its “longevity” in the seawater.