Every week, millions of Americans toss their recyclables into a single bin, trusting that their plastic bottles, aluminum ...

While single-stream recycling is convenient, it has downsides. Contamination, such as food residue, plastic bags and items that can’t be recycled, can degrade the quality of the remaining material, ...

(The Conversation is an independent and nonprofit source of news, analysis and commentary from academic experts.) Alex Jordan, University of Wisconsin-Stout (THE CONVERSATION) Every week, millions ...