Lancet Oncology

By Shannon Kelleher

A group of global scientific cancer experts this week classified a widespread chemical known as PFOA as carcinogenic to humans, confirming decades of research, and building on concerns about human and animal exposure to that chemical and to the larger class of manmade substances that are commonly known as “forever” chemicals because of their persistence in the environment. Separately, the experts deemed a related chemical called PFOS as possibly carcinogenic to humans.