From the IEEE magazine

https://spectrum.ieee.org/ai-guided-robots-are-ready-to-sort-your-recyclables

” We have to do better than that. Right now, the recycling industry is facing a financial crisis, thanks to falling prices for sorted recyclables as well as policy, enacted by China in 2018, which restricts the import of many materials destined for recycling and shuts out most recyclables originating in the United States. .”