Much of the U.S. uses single-stream recycling, where plastic, glass and paper go into one bin. Here’s what happens to that ...

Single-stream recycling makes participating in recycling ... The Conversation is a nonprofit, independent news organization bringing you facts and trustworthy analysis to help you make sense ...

Single-stream recycling makes participating in recycling easy, but behind the scenes, complex sorting systems and contamination mean a large percentage of that material never gets a second life.

So, what makes plastic recycling so difficult? As an engineer whose work focuses on reprocessing plastics, I have been exploring potential solutions. In cities that use single-stream recycling ...