“Completely surprising” discovery based on ancient pollutants suggests mining and smelting continued apace for centuries
Last updated: April 14, 2026 04:53 PM
CO₂
431.9ppm
+1.9
/ year
CH₄
1945.85ppb
+8.44
/ year
Temp
+1.48°C
Peak +1.73°C
Population
8.1B
+67M
/ year