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Tea BagRoughly 1 billion people in the world have no access to safe drinking water, and contaminated water kills more people worldwide than all forms of violence combined. Seeking to provide a solution to this problem, South African researchers have created a water-purifying nanotech tea bag that costs half a cent. Portable, instantly effective and with no chance of recontamination, the tea bag sounds like the best idea since sliced bread.1
