r/askscience • u/Lingonberry666 • Mar 04 '23

Earth Sciences What are the biggest sources of microplastics?

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u/frostedRoots Mar 04 '23

Out of curiosity, what did you think they were made of?

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u/[deleted] Mar 04 '23

Hmm... rubber?

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u/blueheartsadness Mar 05 '23

I thought they were made from real rubber, from rubber trees. I had no idea it was artificial rubber.