No. According to Plastic waste inputs from land into the ocean (2015) [1], the plastic waste entering the oceans from land is mismanaged waste. They define mism

No. According to Plastic waste inputs from land into the ocean (2015) [1], the plastic waste entering the oceans from land is mismanaged waste. They define mismanaged waste as "material that is either littered or inadequately disposed. Inadequately disposed waste is not formally managed and includes disposal in dumps or open, uncontrolled landfills, where it is not fully contained. Mismanaged waste could eventually enter the ocean via inland waterways, wastewater outflows, and transport by wind or tides." They claim that in the United States, only about 2% of waste is mismanaged (though, the total amount of waste generated is enormous and growing). The recovered plastic waste would probably be disposed of effectively, especially since the people collecting it presumably care more than average that it does get disposed of correctly. [1]: http://science.sciencemag.org/content/347/6223/768.long http://science.sciencemag.org/content/347/6223/768.long