The systems use lots of clever tricks, like floating paper and plastics away from metals with water or jets of air, or using eddy currents to push metals out of

The systems use lots of clever tricks, like floating paper and plastics away from metals with water or jets of air, or using eddy currents to push metals out of mixed waste. Here's one example: https://www.popsci.com/technology/article/2013-07/how-it-works-recycling-machines-separate-junk-type/ https://www.popsci.com/technology/article/2013-07/how-it-wor...