The problem with plastic isn’t with having it on the planet, it’s with just collecting it up and disposing of it properly in the first place so it stays out of the waterways and most of the environment.
We can’t even collectively get it all together and burry it properly on Earth which is literally dirt cheap. If we could gather it all up properly to even think about sending it into space that would already solve 99% of the problem if we just turned around and disposed of it in the way we already can without worrying about the impractical expenses of getting it to space.
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