Outside the main entrance to the Austria Center Vienna, where the EGU meeting is taking place, the anthropogenic sediment is more than 8 m thick, whereas beneath the press centre inside the building it’s less than 1 m thick. (Image credit Robert F. Tobler [CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0)] via Wikimedia Commons)
In places beneath Vienna, the depth of sediment containing man-made material is as much as 42 m. And
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Liz Kalaugher
is a freelance science journalist based in Bristol, UK