The study “Environmental deterioration of biodegradable, oxo-biodegradable, compostable and conventional plastic carrier bags in the sea, soil, and open-air over a 3 year period” was recently published by the University of Plymouth (UK). It is often presented as indicating that biodegradable and compostable bags do not offer environmental benefits. Faced with these misinterpretations, often repeated by the media, it is urgent to clarify the reality of the biodegradability of films that comply with the EN13432 standard, a standard that has been a benchmark for industrial composting throughout Europe for more than 20 years.