From mine, to farm, to river

Phosphorus (P) is one of the most vital elements and nutrients on the planet. There is no substitution for it biologically in plants, animals, or people. This controversial nutrient is at the center of international trade tariffs and lawsuits. As of the writing of the article, Diammonium phosphate (DAP), the world’s most widely used phosphorus fertilizer, is over $1,000 a ton. ...

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