Phosphate, key to food production, is choking waterways, but a new sponge-like material returns it to the soil for crops
It is one of the least appreciated substances on the planet and its misuse is now threatening to unleash environmental mayhem. Phosphorus is a key component of fertilisers that have become vital in providing food for the world. But at the same time, the spread of these phosphorus compounds – known as phosphates – into rivers, lakes and streams is spreading algal blooms that are killing fish stocks and marine life on a huge scale.
It is a striking mismatch that is now being tackled by a project of remarkable simplicity. The company Rookwood Operations, based in Wells, Somerset, has launched a product that enables phosphates to be extracted from problem areas and then reused on farmland.
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