Dr. Mehmet Oz made good points on food nutrition and cost in "Give (Frozen) Peas a Chance" [Dec. 3]. If these considerations existed in a vacuum, I'd have no complaint. But I also consider food-production practices: Do they expose workers to toxic levels of pesticides? Pollute local waterways? Poison wildlife? When possible, I buy to affirm. Shopping is like voting; we vote with our dollars, not just on price point but also on whether we want healthy, sustainable farms, factories and communities. I'm not a snob I'm a consumer.