Much fuss is being made about the new NASA study that shows
many of the world's aquifers are depleting. Less is being said about solutions to the problem. No Tech Magazine reports on
a traditional solution in India, the johad. This does not require lots of money, but it does require community effort. The description of the way it works bears a strong resemblance to P. A. Yeoman's keyline system for distributing water.
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