World Water Day 2012: Two innovations for purifying water - CSMonitor.com

http://www.csmonitor.com/World/Making-a-difference/Change-Agent/2012/0322/World-Water-Day-2012-Two-innovations-for-purifying-water?cmpid=ema:nws:Change%20Agent%20weekly%203-26-2012&cmpid=ema:nws:NzQ4MDU4NDEwMgS2