On its face, the Plastic Credit Exchange (PCX) sounds a lot like a carbon offset scheme. You purchase credits equal to the amount of plastic waste you produce, and the PCX invests those credits to offset your activity. Yes, the concept does borrow from carbon offset programs, but it differs in its fundamentals, transparency, and execution, according to PCX founder Nanette Medved-Po. In this episode of Plastic Possibilities, she explains how.