Evidence from glacier ice: Until it was banned, leaded gasoline dominated the anthropogenic lead emissions in South America
Green Car Congress
MARCH 8, 2015
Apart from combustion of leaded gasoline, major sources of anthropogenic Pb emissions include mining, metallurgical processing, and coal burning. While the lead isotope ratios agree with those in the rock of local mines (brown) prior to 1960, they correspond to those of urban air samples in Chile, Argentina, and Brazil (green) after 1960.
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