IMHO the more important part is they used pyrolysis gas chromatography, which breaks down all polymer chains. Besides man-made plastics, guess what else has lo

IMHO the more important part is they used pyrolysis gas chromatography, which breaks down all polymer chains. Besides man-made plastics, guess what else has long hydrocarbon chains, occurs naturally in humans and other biological matter, and behaves similarly under pyrolysis... https://en.wikipedia.org/wiki/Fatty_acid https://en.wikipedia.org/wiki/Fatty_acid Here's an interesting related article: https://www.oaepublish.com/articles/jeea.2022.04 https://www.oaepublish.com/articles/jeea.2022.04 Analysis of saturated, monounsaturated and polyunsaturated fats was demonstrated to form the same pyrolysis products as PE