Consumer groups are stepping up pressure on animal producers and their practice of giving antibiotics to healthy animals to prevent disease. In two new reports, the groups say they're worried that the preventive use of antibiotics is contributing to the development of antibiotic-resistant bacteria, which get harder to treat in humans and animals over time.
The Salinas Valley in Northern California grows about 80 percent of the country's lettuce, and it takes a lot of people to pick and pack it. In a field owned by Duda Farm Fresh Foods, a dozen lechugueros, or lettuce pickers, are bent at the waist, cutting heads of iceberg lettuce. They work frantically to stay in front of a line of 12 more packers, who seal them with tape and toss them onto a conveyor belt.