Walking around late at night - sometimes during the day, depending on the neighborhood - you can see people going through the trash bins or pulling apart trash bags to look for recyclables to turn in for money or anything else of use or value.

On a Sunday afternoon in La Boca.

They put what they find in large bags in big carts. In BsAs, people pull the carts themselves, but in many other areas people uses horses to pull the carts. (Horses aren´t allowed anymore on the car-filled streets of BsAs.)