A corn purchaser writes on his account in northwest China in 2012. In November 2013, officials began rejecting imports of U.S. corn when they detected traces of a new gene not yet approved in China.
Yonathan Zohar, Jorge Gomezjurado and Odi Zmora check on bluefin tuna larvae in tanks at the University of Maryland Baltimore County's Institute of Marine and Environmental Technology.
Courtesy of Yonathan Zohar
Investigators at the U.S. Department of Agriculture have discovered cases of organic fraud abroad as well as in the U.S. In 2013, 19 farmers or food companies were fined a total of $87,000 for misusing the organic label.
Writer Arlo Crawford (left) with his father, Jim Crawford, an elder statesman of the organic farming movement who dropped out of law school in 1972 to grow vegetables.
Melanie McLean/Courtesy of Henry Holt and Co.
Farmworkers pull weeds from a field of lettuce near Gonzales, Calif. Salinas Valley farms like this one rely on wells, which haven't been affected much by the drought.
George Rose/Getty Images