Water is the key to life. It is fundamental to all human activities. Water grows the food we eat, generates the energy that supports our modern economies and maintains the ecological services on which we all depend. Yet billions of people worldwide still lack access to the most basic human right: safe, clean, adequate water.
As you would expect, the vast majority of these people are among the poorest in the world, living in sub-Saharan Africa and southern Asia.
Brent Stirton's images tell many stories if you know how to read them -- from the tragedy brought by lack of safe water or too much water, to the joy and life-changing effects that a new water system can offer. Hear the author describe Stirton's images in an audio slideshow
http://www.cnn.com/2008/TECH/science/09/23/what.matters.thirst/index.html