A woman jogs in Oakland, Calif., last February. Healthier lifestyles may be a reason why poor people live longer in some cities than others. Ben Margot/AP hide caption

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Life Expectancy Study: It's Not Just What You Make, It's Where You Live

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The "Green Moms" group displays painted baby tubs during a June 2013 protest in Quezon, Philippines, showing opposition to the genetically modified rice variety "golden rice," which proponents promote as a solution to Vitamin A deficiency. Bullit Marquez/AP hide caption

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Ronnie Sherman (left), Jerry Feiner (second from left) and other seniors take part in a Hatha aqua yoga class led by yoga instructor Rebecca Watson (second from right) at Balfour at Riverfront Park in Denver in July. Helen H. Richardson/Denver Post via Getty Images hide caption

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Smoking and high rates of obesity in the U.S. are holding down gains in life expectancies, a new analysis finds. Richard Drew/AP hide caption

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