http://www.npr.org/blogs/thesalt/2014/01/02/257393870/how-mass-produced-meat-turned-phosphorus-into-pollution It’s a quandary of food production: The same drive for efficiency that lowers the cost of eating also can damage our soil and water.Take the case of one simple, essential, chemical element: phosphorus.Phosphorus is one of the nutrients that plants need to grow, and for most of human history, […]