Air Max 2017 Blue

out there in every city, and not just cities but all across the country that deliver these, are massive, and they're complicated, and they're complex and they're evolving. And we're using computer and predictive modeling and Air Max 2017 Blue sonar and all sorts of things to advance the industry. But on a daily basis, it is really problem solvers banding together to deliver something that we know matters. LICHTMAN: Martin Melosi, you've studied the history of American water systems. Nike Air Max 2017 Mens Blue

So these early systems essentially were transportation networks. They went from a source to a dam or a pumping facility and then down to the marketplace, and that alone was extraordinary, but there was no filtration systems at that time, no treatment of the water or whatever. So in reality, the systems that we have today kind of began in an era before we understood bacteriology. So what came after that, of course, is a modification of those initial systems. LICHTMAN: That's kind of amazing that they coul.

The first one was in Philadelphia in 1801 and in the United States, and it really actually served as a model all over the world for a long, long time. LICHTMAN: And what was life like back then? I mean, what did people have in mind when these systems were being built?MELOSI: Well, it's extraordinary that they were built. It's extraordinary that they were built when they were built because our knowledge of health and disease vectors was so primitive that they really didn't understand how water could carry disease or any kind of other potential pollution. So essentially at that particular era, the belief was if the water looked dirty or smelled bad or tasted bad, that you might need to find another source. And they didn't know anything about bacteriology until the 1880s at the earliest.

Air Max 2017 Blue

Air Max 2017 Blue

When did our modern plumbing first get started?MELOSI: Well, the modern city water system, and that is that leads up to the house, for most cities and towns in the United States was in the 1830s and beyond.

Air Max 2017 Blue

Air Max 2017 Blue

Air Max 2017 Blue

Air Max 2017 Blue

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Air Max 2017 Blue

Air Max 2017 Blue

Air Max 2017 Blue

Air Max 2017 Blue

Air Max 2017 Blue

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