(free clip art from CoolClips.com)
Seriously, this is a fascinating account of sewage treatment in Scientific American. Ten pages long, but in a light, entertaining style, it covers the history of sewage disposal, the complexity of the problem in large cities, the continual maintenance required, and the actual process of sewage treatment.
Sure, this is a problem we'd prefer to flush and forget, but it's a serious health issue. And with more than six billion people on the planet, the poop really adds up. We can ignore it ourselves, but only if we've got skilled people doing what must be done. An article like this - which really is very entertaining - helps to remind us that we live in a complex, interrelated society that requires careful planning and some esoteric knowledge.
Give it a try. You might be surprised.
PS. My continued apologies for the slowdown here. I've got lots to discuss, just little time for it right now. So you might have to make do with cartoons and videos, rather than my usual long-winded monologues. (Hmm,... that might not be such a sacrifice after all.)
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