Ice core records uncover widespread air pollution from early 20th-century copper production
Verified: 2 outlets have reported this story since Nov 10.
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, where they joined layers of history embedded in the ice.
How sure are we
Two or more outlets reported this story and its reliability score reached 65%, so WorldPulse marks it verified. That means more than one outlet says so, not that it is proven true.
Who reported it
Also reported by miragenews.com (found in GDELT's list of news articles)
43m agoScore bands
What moves the score
Not in the score: AI checks and reader flags. Verified is separate: two or more independent outlets and a score of at least 65%.
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