Moringa oleifera: a supermarket on a tree!
Imagine a tree in your backyard that will meet all your nutritional needs, take care of you medicinally, and purify your water for you. This tree actually exists. Meet the Moringa Tree
http://miracletrees.org/ At this website you find lots of useful documents on how to treat water with moringa seeds, grow moringa, produce leaves... etc
Moringa oleifera can cure the ill, Moringa can purify water, it can feed the hungry and is a very efficient weapon against malnutrition.
Here under 2 exceptional documentaries about moringa oleifera:
Purify water with moringa seeds -
All about the moringa tree -