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 protein, unsaturated fat composition and fiber in almonds all very likely play a role in helping to curb appetites. iStockphoto.com hide caption

itoggle caption iStockphoto.com

New York City Council speaker and then-mayoral candidate Christine Quinn speaks at a fast-food workers' protest outside a McDonald's in New York in August. A nationwide movement is calling for raising the minimum hourly wage for fast-food workers to $15. Richard Drew/AP hide caption

itoggle caption Richard Drew/AP

McDonald's USA President Jeff Stratton responds to an employee who burst into an event. YouTube screengrab hide caption

itoggle caption YouTube screengrab

Foster Farms, the chicken processor at the center of a major salmonella outbreak, now faces the threat of a shutdown at its facilities. /PR Newswire hide caption

itoggle caption /PR Newswire

A salmonella outbreak that has sickened more than 270 people has been linked to raw chicken produced at three Foster Farms facilities in California. /PR Newswire hide caption

itoggle caption /PR Newswire

The Centers for Disease Control and Prevention's PulseNet service monitors clusters of sickness linked to potentially dangerous strains of foodborne pathogens such as E.coli or salmonella. Reed Saxon/AP hide caption

itoggle caption Reed Saxon/AP

Experts say lots of factors determine how quickly an oil deteriorates — from the variety of the olives, to how the oil is produced and stored. Matthias Schrader/AP hide caption

itoggle caption Matthias Schrader/AP