Minnesota Public Radio slideshow:
A new kind of iron ore
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The baller forms ore and other ingredients into 1-inch "greenballs," which are then dried and conveyed to the furnace. (MPR Photo/Stephanie Hemphill)

The baller forms ore and other ingredients into 1-inch "greenballs," which are then dried and conveyed to the furnace.

(MPR Photo/Stephanie Hemphill)
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