Study: Smog chops 2 months off Mexicans' lives

MEXICO CITY (AP) -- Mexicans would live an average of two months longer if they breathed cleaner air, Harvard researchers conclude in a study published Monday. The study found that some 7,600 people's lives were cut short each year by diseases related to air pollution between 2001-2005, representing about 1.6 percent of annual deaths in Mexico....

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