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Pervasive Arctic lead pollution suggests substantial growth in medieval silver production modulated by plague, climate, and conflict.
McConnell JR, Chellman NJ, Wilson AI, Stohl A, Arienzo MM, Eckhardt S, Fritzsche D, Kipfstuhl S, Opel T, Place PF, Steffensen JP. McConnell JR, et al. Among authors: place pf. Proc Natl Acad Sci U S A. 2019 Jul 23;116(30):14910-14915. doi: 10.1073/pnas.1904515116. Epub 2019 Jul 8. Proc Natl Acad Sci U S A. 2019. PMID: 31285330 Free PMC article.
Preindustrial 14CH4 indicates greater anthropogenic fossil CH4 emissions.
Hmiel B, Petrenko VV, Dyonisius MN, Buizert C, Smith AM, Place PF, Harth C, Beaudette R, Hua Q, Yang B, Vimont I, Michel SE, Severinghaus JP, Etheridge D, Bromley T, Schmitt J, Faïn X, Weiss RF, Dlugokencky E. Hmiel B, et al. Among authors: place pf. Nature. 2020 Feb;578(7795):409-412. doi: 10.1038/s41586-020-1991-8. Epub 2020 Feb 19. Nature. 2020. PMID: 32076219