A million dollars is on offer for anyone who can develop a cheap, easy-to-use and sustainable way to remove arsenic from drinking water in developing countries. Arsenic contamination has affected millions of people, largely in Bangladesh, after wells dug to provide clean water turned out to have tapped water laden with arsenic from deep mineral deposits.
The Grainger Challenge prize will go to the developer of a technology that can reduce arsenic levels from the 300 parts per billion found in some areas to a safe 10 parts per billion. The US National Academy of Engineering is administering the prize. Details at .
