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

Don't throw away your egg cartons after they're empty. Instead, consider using them in your garden, where they have many ...

paper, cardboard boxes, wine bottles and more into one large blue bin and roll it to the curb on garbage day. Fulfilling that pledge of what the city called “single-stream recycling” has ...