Sales of organic milk are growing at 23% per year and now account for more than 3% of all milk sold in the U.S. "Some of my friends who don't really think about feeding their children organic food will feed them organic milk. ... I look at what I pay for everything else, but I don't for the milk," one mother said. But a debate continues over what can be considered organic, with some purists insisting organic milk cows should be allowed to graze on grassy pastures.
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