In this globe and mail article:
https://www.theglobeandmail.com/news/nat...ian-cities-in-the-lurch/article37536117/
It says:
"As of Jan. 1, 2018, China, which buys approximately two-thirds of North America's recyclables, requires that contamination levels – newspaper smeared with ketchup, plastics mixed with broken glass – can't exceed 0.5 per cent as part of its National Sword initiative."
Could a solution be just to apply some pre-sorting?
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