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American farms like this iceberg lettuce field owned by Duda Farm Fresh Foods outside Salinas, Calif., are facing a dwindling supply of farmworkers from rural Mexico. Kirk Siegler hide caption

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Kirk Siegler

With instant messages buzzing, emails pinging and texts ringing, how can employers increase productivity in the workplace? Software companies are tackling the problem, tracking employees' computer time to find ways to improve their efficiency. iStockphoto.com hide caption

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iStockphoto.com

Paul Applewhite of Applewhite Aero isn't allowed to fly this 3-pound Styrofoam plane. That's because he has added circuitry to make it autonomous — it can find its way to specified coordinates — which means it's an unmanned aerial vehicle requiring a special testing permit. Martin Kaste/NPR hide caption

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Martin Kaste/NPR

Californian State Assemblyman Richard Pan (center) is the author of legislation that would bar higher prices for health insurance sold to smokers. Rich Pedroncelli/AP hide caption

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Rich Pedroncelli/AP

Beekeepers demonstrate at the EU headquarters in Brussels Monday, as lawmakers vote on whether to ban pesticides blamed for killing bees. Georges Gobet/AFP/Getty Images hide caption

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Georges Gobet/AFP/Getty Images

What is a "tea blend?" Sasha/Courtesy of Adagio Teas hide caption

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Sasha/Courtesy of Adagio Teas