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Water-purifying tech brings new meaning to "coffee foam"

Scientists already know that powder made from spent coffee grounds can be used to rid water of harmful heavy metal ions … that's all well and good, but the powder then needs to be filtered out of the water. A group of Italian scientists has developed a step-saving alternative, in the form of a filter made of coffee-impregnated foam... Continue Reading Water-purifying tech brings new meanin
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