Perfluorooctanoic acid is back in the news. And you may be thinking, perfluoro-what? PFOA, as it’s more commonly known, is a key component of non-stick cookware coatings, stain resistance treatments, greaseproof food packaging and other products. As we reported a few years ago, scientists discovered that it is bad news where human health and the environment are concerned. So the companies that make it invented a substitute. Which, it turns out, is equally bad for human health and the environment, according to scientists.