Summary:

- The EPA is considering allowing the use of phosphogypsum, a radioactive waste product from fertilizer production, in the construction of roads and other infrastructure.

- Phosphogypsum contains low levels of radioactive materials and has been classified as a hazardous waste, with strict regulations on its disposal.

- The proposed change in regulations could benefit companies like Mosaic Co., a major producer of phosphate fertilizers, by allowing them to find a cheaper way to dispose of the waste product.