Environmental

Missouri has significant lead contamination concerns in older urban areas like St. Louis primarily due to:

AIndustrial farming practices
BLead paint in pre-1978 housing stock and historic lead smelting operations✓ Correct
CNatural lead deposits in soil
DLead pipes in commercial buildings only

Explanation

St. Louis and other Missouri urban areas have significant lead contamination from pre-1978 lead-based paint in older housing stock and from historic lead smelting and manufacturing operations.

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