I actually dont know, Boats?

Loophole: plastics are made from oil, so ha!

That's not a loophole. Yes, plastics are made from oil, but the litter this statistic is mentioning is plastics not oil spills like you pointed out.

Does it say plastics?

My thoughts, but I try not to comment too much for stuff like that. People like to dislike my posts.

It does in the articles I read. Here's one...https://www.ecowatch.com/80-of-ocean-plastic-comes-from-land-based-sources-new-report-finds-1891173457.html
The article I read that says 20% comes from boats and such is a pdf file which I can't post

I came across some articles that refer to it as "marine debris", which is mostly plastics.

Alright, @sir_spiderman and @silvermyth, I finally found a non pdf article lol And you were right Spidey, oil rigs are a part of the 20%.....https://www.nationalgeographic.org/encyclopedia/great-pacific-garbage-patch/

ITS FISHING BOATS DUMPING LITTER

Boating cannot account for 20% of the pollution. I'd be surprised if it made up more than 2%. There just are not enough boats to be doing that much,