This potentially scary problem is just now getting on my radar: the alarming rise in measured levels of arsenic and other toxins in the U.S. food supply. Discover Magazine's current issue features a cover story on the hard-to-explain spike in such contaminants.
Here's a link to Discover, although it's one of those magazines that only lets subscribers read entire articles online. And here's what Web MD says about the risks of too much arsenic in our diets (bottom line: if your kids drink a lot of juice, dial it back -- a good idea anyway since juice is just sugar, in the opinion of this healthy foodie).
I found this infographic about arsenic: