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.
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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.
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.