"About three years ago, Susan Antler was at a composting facility in B.C. when a truck full of rotting avocados pulled up.
It was "51 feet, 52 feet [approx. 14 metres] — like, [a] massive truckload," said Antler, executive director of the Compost Council of Canada. "And the facility just wouldn't accept it."
Why? Because each of those thousands of rotting avocados was "contaminated" by a little plastic PLU (or price look up) sticker. It carries a number, standardized around the globe, that identifies the type of produce and whether it's conventionally or organically grown, to help cashiers enter the right price at the supermarket checkout."