My wife and I buy most (if not all) of our produce at Whole Foods and places like that so I forget what regular grocery stores are like -- but I had to laugh the other day when I saw a sign at an Albertson's that said the produce was "waxed for freshness".
I know the wax is not as much of a chemical issue (except for the "food grade" petroleum, I guess) but it reminded me.
It's just funny that they make a point to explain the waxing but don't offer any warning about what else is on/in the produce.