“A small problem gets larger if you ignore it” at Pompeii

The eruption of Mount Vesuvius near the Bay of Naples in AD79 devastated the local towns and villages but left archaeologists with a rich record of that ancient way of life. Pompeii has been subjected to formal archaeological investigations since the mid-19th century, but even today many areas remain unexcavated. The throngs of tourists that flock to the site, and the growing expense of conserving the remains that have been exposed, are causing some professionals to advocate a new approach to preserving this World Heritage site.
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Lost cities #4: Pompeii was preserved by disaster. Now it risks ruin all over again
By Emily Mann
The Guardian
August 11, 2016