Poor countries, where millions live in slums without proper sanitation, need more pipes in the first place, not to mention reservoirs and purification works.

不太发达的国家，成百万的人还住在贫民窟里，没有恰当的卫生设备，他们首先需要增加水管，更别提水库和净水措施了。

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The report, drawn up by the world Commission on Water for the 21st Century, says three billion of the world's most deprived people live in squalor and misery without access to proper sanitation.

这份报告是21世纪水资源组织发出的，在报告中说有三十亿最贫穷的人口得不到必要的卫生保证。

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But of course, safe water is impossible without proper sanitation and hygiene, so we launched those efforts shortly afterwards.

FORBES: Business Model Innovation: East Meets West Delivers Sanitation Solutions at Scale

More than 2.5 billion people live without proper sanitation.

UNESCO: World Water Day 22 March 2010: Clean Water for a Healthy World

Kenya, with eight million without access to proper sanitation but a university filled with bright and eager minds to help solve the problem, was an ideal testing ground.

FORBES: Who Gives A Crap? Sanitation, Energy and Entrepreneurship in Kenya