A clampdown on contamination in growing fields has pushed out wildlife and destroyed habitats. Adam Cole/NPR hide caption

itoggle caption Adam Cole/NPR

A dairy farmer drives some of his Holstein cows out to pasture in the Madison County, N.Y. town of Lenox. Jim Commentucci/The Post-Standard /Landov hide caption

itoggle caption Jim Commentucci/The Post-Standard /Landov

A member of the community supported agriculture program at Congregation Shearith Israel picks from boxes of squash and cucumbers in Atlanta. Some purists say CSAs are drifting away from their roots. John Amis/AP hide caption

itoggle caption John Amis/AP

Pigs take a mud bath at the De Jofrahoeve pig farm in Esch, Netherlands. Dutch farmers treat their animals with almost three times the antibiotics that their Danish neighbors use. Robin Utrecht/AFP/Getty Images hide caption

itoggle caption Robin Utrecht/AFP/Getty Images

One of the community gardens divided up into individual plots run by Denver Urb Gardens. Courtesy of Denver Urb Gardens hide caption

itoggle caption Courtesy of Denver Urb Gardens

Scientists say the corn rootworm is growing resistant to Bt corn. Snbetor via Flickr hide caption

itoggle caption Snbetor via Flickr

D. Landreth Seed Co. President Barbara Melera with a bunch of peanuts at her Philadelphia Flower Show booth. Max Matza for NPR hide caption

itoggle caption Max Matza for NPR

Samples of forage seeds in the International Center for Tropical Agriculture gene bank recently sent to the Global Seed Vault in Svalbard, Norway. International Center for Tropical Agriculture hide caption

itoggle caption International Center for Tropical Agriculture

Breeding sows in crates at a subsidiary of Smithfield Foods in 2010. The photo was shot by the Humane Society as part of an undercover investigation. Humane Society/Associated Press hide caption

itoggle caption Humane Society/Associated Press

The Know Your Farmer interactive map shows USDA-supported projects and programs related to local and regional food systems for the years 2009-2011. USDA hide caption

itoggle caption USDA