Q: Is organic food completely free of pesticides?
A: Not necessarily. It sometimes contains trace amounts of synthetic chemicals.
Q: How can that happen?
A: There are lots of ways. Pesticides can be carried to organic fields by irrigation water, rain, wind-blown dust, fog, and drift from spray that has been applied elsewhere. And even if that doesn’t happen, the soil in which organic foods are grown could contain traces of chemicals that were used years ago.
There is so much “background” chemical pollution on our farmland that it’s impossible to make a claim for absolutely residue-free food. In some soils the contamination is so bad that it could take years for all the chemicals to disappear. [Read more…]