It can be a bit strange that the policy that are calling for healthy ecology are the one that is destroying the world oceans.
The one to blame for this is Gro Harlem Brundtland with her sustainable development. Still this is what UN Agenda 2030 are working for. So all the blame for this mess is UN and all the insane ideas they introduce.
The reason for the plastics appear in the oceans is related to recycling or lack of it. So the plastic western countries can not recycle, they just dump it to third nations like Africa and Asia. And they can not use it either so they just dump it in the rivers. But also toxic are also sent as recycle to countries like China.
Ironically it is Western environmental ideologies that are complaining about plastic in the oceans. But it is them that are the problem and the one that have created it. So shame on you left wing lunatics.
Reference:
[1] https://resett.no/2018/07/02/forskningsrapport-gronn-politikk-odelegger-havene-og-gro-harlem-brundtland-har-mye-av-skylden/
[2] https://www.thegwpf.org/content/uploads/2018/06/Save-the-oceans.pdf