I'm not an expert and I'm not that interested in arguing specific numbers - I have no emotional attachment to them. The article being discussed here disputes your claim.
A recent study estimates that more than a quarter of all that waste could be pouring in from just 10 rivers [...] The 10 rivers that carry 93 percent of that trash [...], so 10 rivers are said to contribute 25% of total trash and 93% of river-trash. That'd leave ~68% from the shore, which sounds very high.
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I'm not an expert and I'm not that interested in arguing specific numbers - I have no emotional attachment to them. The article being discussed here disputes your claim.
A recent study estimates that more than a quarter of all that waste could be pouring in from just 10 rivers [...] The 10 rivers that carry 93 percent of that trash [...], so 10 rivers are said to contribute 25% of total trash and 93% of river-trash. That'd leave ~68% from the shore, which sounds very high.
https://ourworldindata.org/plastic-pollution#ocean-plastic-s... also has more input if you're interested.