Plastic pollution has become one of the most complex environmental issues, especially in the context of increasing production and demand for plastic materials. While innovations in polymer chemistry have radically changed our lives in the mid-20th century, the outstanding properties of plastics such as durability, chemical stability, strength and many other characteristics pose a serious problem for recycling such materials.
source https://phys.org/news/2021-01-efficient-solid-state-depolymerization-pet.html