圖表：布瑞摩爾（Nadieh Bremer）<br>（SOURCES: *LEAD POLLUTION RECORDED IN GREENLAND ICE INDICATES EUROPEAN EMISSIONS TRACKED PLAGUES, WARS, AND IMPERIAL EXPANSION DURING ANTIQUITY, BY J. R. MCCONNELL ET AL., IN PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES USA, VOL. 115, NO. 22; MAY 29, 2018; *PERVASIVE ARCTIC LEAD POLLUTION SUGGESTS SUBSTANTIAL GROWTH IN MEDIEVAL SILVER PRODUCTION MODULATED BY PLAGUE, CLIMATE, AND CONFLICT: BY J.R. MCCONNELL ET AL., IN PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES USA, VOL. 116, NO. 30: JULY 23,2019）
