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  • n. A mound of phosphogypsum


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  • Phosphogypsum stacks, also known as gypstacks, are mountains of waste left over from fertilizer production. Some of that waste is radon and uranium.

    The EPA says that it's too radioactive to be buried, so it's piled in these stacks. There are 25 of these things in Florida, and they're some of the highest points in the state.

    Laura Newberry, Battle over phosphate mining roils small Fla. town, PBS Newshour (Oct. 31, 2018)

    November 1, 2018