World’s best water purifier may be the cactus

Y! Green: Scientists from the University of South Florida have discovered the water purifying power of the prickly pear cactus. An extract from the desert-dweller is very effective at removing sediment and bacteria from dirty H2O and, even better, it grows all around the world. The scientists aren't the first to realize this plant's ability. Nineteenth-century Mexican communities used the cactus as a water purifier. The thick gum in the cactus that stores water is responsible for the ......

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