Breakfast cereals still contaminated by weed killer, environmental group says

(CNN) -- Several popular breakfast foods are testing positive for trace amounts of a controversial weed killer that can increase the risk of cancer.According to a report released Wednesday by an environmental advocacy group, products including Cheerios and Natural Valley are included in the report.The Environmental Working Group found that all 21 of the products it tested had levels of glyphosate that were higher than what is recommended for a child's health.Manufacturers maintain the foods are