In Asia, millions of citizens drink polluted water. One of the main threats to human health is the natural occurrence of arsenic in groundwater. Over 200 million people are estimated to be at risk of high arsenic exposure from drinking water in the Asian region. Local governments, funding agencies, local communities, universities, NGOs - all have recognized the arsenic problem and its devastating effects on human well-being. Not surprisingly, millions have been invested in finding solutions for the arsenic problem. Filters of different make, size and quality have been designed, deeper...