Tracking lead levels in soil over time is critical for cities to determine lead contamination risks for their youngest and most vulnerable residents, according to a new study.
From https://jamesjohnson10.blogspot.com/2019/10/study-finds-topsoil-is-key-harbinger-of.html
from
https://jamesjohnson10.wordpress.com/2019/10/15/study-finds-topsoil-is-key-harbinger-of-lead-exposure-risks-for-children/
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