Modern waste management facilities can actually sort out cans and bottles from the other trash. For the cans they use electromagnet while the trash is on the be

Modern waste management facilities can actually sort out cans and bottles from the other trash. For the cans they use electromagnet while the trash is on the belt that makes the cans jump farther than the garbage. For the bottles, something about the speed of the belt and an air pump. At any rate, better to get these people the help they need and out of the trash. Source: modern marvels episode on wastemanagement and actually got to take a field trip in college and when I saw the cans jumping I was pumped to have see that episode of mm.