evidence: "Unsafe levels of a weed killer chemical in oat products," cries a headline from CNN published earlier this week. The accompanying article cites a new report from the Environmental Working Group (EWG), a nonprofit advocacy organization, that revealed traces of glyphosate—the main ingredient in the pesticide Roundup—in several types of oat cereal, oatmeal, granola, and snack bars. Almost three-quarters of food samples tested "showed higher glyphosate levels than what the group's scientists believe to be 'protective of children's health,'" CNN reported. [...] In other words, the EWG's benchmark for a safe level of glyphosate is below 160 ppb, or 0.16 ppm—and most of the samples of conventional oat products tested in their study exceeded this. Several different brands of oats and granola were tested in the study, including Quaker Oats, Cheerios, Barbara's, and Giant. Quaker Old Fashioned Oats were found to have the most glyphosate per sample, with more than 1,000 ppb in two of three samples tested.