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7 whimsical, wonderful images of water

By: Katherine Butler on March 21, 2012, 6:30 p.m.
water spilling from fountain

Photo: eVo photo/Flickr

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The science of sanitation

When water causes illness, it's most likely that the water was contaminated with fecal matter. According to, only 10 percent of all wastewater gets treated. This means the rest of it flows freely into our water — and our systems. Only 62 percent of the world’s population has access to improved sanitation. Experts estimate that if world water sanitation was improved, as much as one-tenth of the world’s global disease burden could be prevented.