The fair-trade label was created decades ago to help artisans in developing nations. Now, there are fair-trade soccer balls, fair-trade soaps and fair-trade ice pops. Next up for the movement: the American dairy industry.

The yogurt maker Chobani is working with Fair Trade USA, a nonprofit group in Oakland, Calif., on creating a label that would signal that the milk in its products came from farms that treated their workers and cows humanely.

By Michael Corkery

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