Phosphorus is essential for all living organisms. So, it’s not surprising that humans get their phosphorus from other living organisms, mostly plants, that have absorbed phosphorus from the soil. The introduction of phosphate fertilizers made it possible to ensure that enough phosphorus for healthy plant growth is available in practically any farmland soils. At first, farmers had access to phosphate fertilizers from bone ash and later from phosphate deposits accumulated from bird and bat guano on certain tropical islands (some of which deposits were 30 feet deep before they were mined and completely exhausted). More recently, phosphates have come from mining rocks rich in phosphorus. All seemed well for the long term as supplies of the rock phosphates were thought to be hundreds of years at current rates of consumption. But a group of researchers upended the consensus in 2009 forecasting that phosphate production could peak as early as […]