The link is for an article in the NY Times on the web, which describes how inadequate access to toilets and clean water accounts for 1/2 of the population of many developing countries being sick at any given time with parasites, cholera, etc. Talks about how in some parts of India there is one toilet for 1440 people.

Sobering, and reiterates what several have said on this site - plumbers and plumbing really has a huge part of creating a safe and healthy society - more than most people could ever know.