Phosphorus for Us

Phosphorus is one of those elements that has both negative and positive associations. When refined, it can be obtained in various forms. White phosphorus is exceptionally dangerous, and reacts to oxygen in the air. The stuff explodes (and is used in bombs), gives off smoke, burns exceptionally hot, is stored under water for safety, and can kill in several ways. Mining phosphate rock in Naru Image credit: Wikimedia Commons / Lorrie Graham/AusAID ( CC BY 2.0 ) From the positive side, we need phosphorus. Life needs it. When looking for a video to add, I saw (but rejected because it was boring) a video about foods rich in it. Plants draw phosphorus up from the soil. It is in our cells, which rely on phosphorus to do cell stuff. And yet, phosphorus doesn't just lay around waiting for some jasper to say, "Oh, look! I found phosphorus in its elemental state!" That'll be the day! It is abundant in the earth's crust and can be extracted from living (or formerly ...