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Ice core records uncover widespread air pollution from early 20th-century copper production

The Brief · written from 4 sources

Ice cores from Greenland, northern Canada and the Russian Arctic record arsenic, lead and other heavy metals linked to early 20th-century copper production.
Emissions from the Anaconda Copper Mine complex near Butte, Montana, about a century ago were carried by winds over the Arctic and deposited by storms.
The study is published in Nature Sustainability on 10 November 2026.

Why it matters

The findings tie a historic industrial source to widespread heavy-metal deposition far from its origin, and the Nature Sustainability paper links it to health burdens, which matters for how past pollution is assessed in environmental and health research.

Who’s affected

environmental scientists and climate researchers
public health researchers studying heavy-metal exposure
historians of mining and industrial pollution

#arsenic
#ice cores
#air pollution
#copper smelting
#heavy metals
#arctic

About a century ago, the Anaconda Copper Mine complex near Butte, Montana, was emitting vast amounts of air pollution into the atmosphere. As small particles of arsenic and other heavy metals were carried by winds over the Arctic, storms eventually helped pull them to the ground…

Read the full story at phys.org ↗