Developing a good solution for arsenic.
D001151:Arsenic / Q000009:adverse effects / Q000737:chemistry*; D001459:Bangladesh; D002606:Charcoal / Q000737:chemistry; D002614:Chelating Agents / Q000737:chemistry; D003906:Developing Countries; D007391:International Cooperation; D007501:Iron / Q000737:chemistry; D010084:Oxidation-Reduction; D010777:Photochemistry; D014873:Water Pollutants; D018508:Water Purification / Q000379:methods*; D014881:Water Supply