Updated July 6. See below.

Yesterday,organic farming activist Andrew Kimbrell, the executive director of the Center for Food Safety, wrote a piece for Huffington Post called "Obama Organic Family Garden: Swimming in Sludge?" in which he suggests that lead levels in the Obama's garden -- said to test at 93 parts per million -- are high enough to consider avoiding that soil for growing fruits and vegetables. Says Kimbrell: Read more...