• Question: how much water do you provide in a day?

    Asked by bobwoodrass11 to Ken on 14 Mar 2012.
    • Photo: Ken Gibbs

      Ken Gibbs answered on 14 Mar 2012:

      Ah ! Now there’s an interesting question that I can’t answer mathematically – but perhaps you can. Let’s say that I have provided 1 million handpumps for (conservatively) about 150 million people and each person takes (or uses) around 15 to 20 litres per day. Can you work that out in cubic kilometres per day ?

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