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#159408
Tue 30 Apr 2013 01:23:PM
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Joined: Feb 2001
Posts: 381,903
Launch Director
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OP
Launch Director
Joined: Feb 2001
Posts: 381,903 |
Scientists found, in the Laguna de Rio Seco lagoon, at an altitude of 3,020 m., evidence of atmospheric pollution caused by lead and linked to metallurgical activities from 3,900 years ago (Early Bronze Age). Lead pollution increased gradually during the Late Bronze Age and Early Iron Age, coinciding with the development and expansion of metallurgy in southern Europe.  Source: Lake found in Sierra Nevada with the oldest remains of atmospheric contamination in Southern Europe
David Cottle
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