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Trumpet Blowing

Ever since I first brought to Western attention the problem of arsenic in groundwater on the Indian sub-continent through my article in The Guardian a decade ago, I’ve tried to keep up with developments. Now, researchers have discovered that the dried roots of the water hyacinth can remove arsenic from contaminated water. This could provide a simple, effective and, most importantly, cheap method of removing arsenic from the water supply in some of the poorest regions of the world.

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