Could an ingredient found in the dye that provides cola with its traditional brown shade cause cancer? A controversial report released by the Center for Science in the Public Interest (CSPI) says yes. According to CBS News, the consumer interest group, CSPI, published a report, which linked Coca-Cola, Diet Coke, Pepsi, and Diet Pepsi, as well as some other brown-hued sodas to a cancer-causing chemical. The chemical, 4-methylimidazole, more commonly referred to as 4-MI or 4-MEI, has been proven to cause cancer in lab rats and mice. The CSPI has petitioned the FDA to enforce a labeling system that would...