If you live in a place that picks up your recycling, it's easy to think they're doing it to save the earth. In fact, companies make money off recycling - lots of money. It's a $100 billion business. And as Stacey Vanek Smith from our Planet Money team explains, that business has fallen on hard times.
STACY VANEK SMITH, BYLINE: I followed my old newspapers and yogurt containers to my neighborhood recycling center, a place in Brooklyn called Sims.