Pieter Hoff says the nice thing about the siphons is that, once collected, the water is not able to evaporate anymore.
VOA: special.2010.07.13
Mr.Hoff says the trick is that nature does not dig a hole like we humans do to plant seeds.
VOA: special.2010.07.13
Pieter Hoff says he is now doing experiments with twenty thousand Waterboxxes in countries including Pakistan, Ecuador and the United States.
VOA: special.2010.07.13
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