Change Agent World Water Day 2012: Two innovations for purifying water

Harnessing the bacteria naturally occurring in water and using solar energy are just two innovations that may help bring clean drinking water to the world's poor.

Erik de Castro/Reuters/File

[Editor's note: Today, March 22, is World Water Day]

of 5 stories this month > Get unlimited stories
You've read 5 of 5 free stories

Only $1 for your first month.

Get unlimited Monitor journalism.