The World Health Organization has fingered a high body mass index for roughly half-a-million cancer cases per year. Not surprisingly, North America, with its proliferation of obesity, is seen to be most affected. Of course, a high BMI is associated with a wide array of diseases, but an association with cancer has only been hinted at, before. Now WHO is pointing the finger with little reservation. Scientific American breaks the news:

The Oregonian has its take, along with links to other resources on the subject, here: