Chris and Sara Guerre are among a growing number of farmers who have made the choice to rent land to farm instead of buy because of increasing property values. Zac Visco for NPR hide caption

itoggle caption Zac Visco for NPR

Ritter Sport says the chemical responsible for the vanilla-like aroma in its top-selling Voll-Nuss chocolate nut bar is all natural. But Stiftung Warentest — basically Germany's version of Consumer Reports — disagrees. Ariel Awesome/Flickr hide caption

itoggle caption Ariel Awesome/Flickr

Retired farmer Joe Govert looks at a parcel of family land near Tribune, Kan. It has been enrolled in the Conservation Reserve Program. Charlie Riedel/AP hide caption

itoggle caption Charlie Riedel/AP

Seed corn sits in the hopper of a planter. Scott Olson/Getty Images hide caption

itoggle caption Scott Olson/Getty Images

Young broilers nibble feed at a chicken farm in Luling, Texas. The Food and Drug Administration has issued new guidance on how drug companies label antibiotics for livestock. Bob Nichols/USDA/Flickr hide caption

itoggle caption Bob Nichols/USDA/Flickr

Tractors sit on a sugarcane plantation on the land of a Guarani-kaiowá indigenous community in Brazil. Tatiana Cardeal/Courtesy Oxfam hide caption

itoggle caption Tatiana Cardeal/Courtesy Oxfam

A relief worker looks over boxes of aid provided by the U.S. on November 14, 2013 in Leyte, Philippines. Proponents of food aid reform say it makes more sense for the U.S. to buy food donations locally than ship them across the globe. Chris McGrath/Getty Images hide caption

itoggle caption Chris McGrath/Getty Images

Crisco was the original product made with partially hydrogenated soybean oil, which contains trans fats. Today, Crisco has only small amounts of the fats. Tony Dejak/AP hide caption

itoggle caption Tony Dejak/AP

In recent years, pork producers have found ways to keep the animals healthy through improved hygiene. M. Spencer Green/AP hide caption

itoggle caption M. Spencer Green/AP

Warren Buffett (left), Howard G. Buffett (center) and grandson Howard W. Buffett collaborated on a book about the challenges of feeding more than 2 billion more mouths by 2050. Scott Eells/Bloomberg/Bloomberg via Getty Images hide caption

itoggle caption Scott Eells/Bloomberg/Bloomberg via Getty Images

The long arms of pivot irrigation rigs deliver water from the Ogallala Aquifer to circular fields of corn in northwestern Kansas. Dan Charles/NPR hide caption

itoggle caption Dan Charles/NPR