A group of researchers in South Africa has developed a new way to obtain clean drinking water. The recently revealed filter looks like a tea bag but contains activated carbon that removes dangerous chemicals found in water. In addition it costs only half a cent to use, a remarkable feat considering other technologies can cost at least $100.
Unfortunately it can only be used for 1 liter of water before it needs to be discarded. Still this is a significant development for the nearly 1 billion people without access to clean drinking water and 2.6 billion without access to sanitary facilities.
Dr. Eugene Cloete and his team at Stellenbosch University explain their “tea bag” filter in the video: