Touring A Wastewater Treatment Facility

How do these massive plants turn brown sludge into water? "The operation room rivals the deck of the Starship Enterprise; there are monster pumps, and in the dome of each egg a lovely oculus, a functional cousin of that calm, all-seeing eye in the Pantheon. But what really sends me is the transformation this plant is working on Boston's once sullied harbor, restoring it to a sparkling realm clean enough to please bluefish and seals. ...Human infrastructure is at once heroic and ordinary, gigantic and intimate, always a membrane between the great and the small, the collective and the personal, between things as close as our skin and as remote as the distant future."

Thanks to Chris Steins