Water is essential to health worldwide.
Yet 1 billion people have no access to drinking water or proper toilet facilities.
This can lead to a variety of diarrheal illnesses, some of which are very serious.
MPR News' regular medical analyst Dr. Jon Hallberg joines All Things Considered host Tom Crann to discuss some of the problems from unclean water and how they can be fixed.
Use the audio player above to hear their entire conversation.