A synthesis of mercury research in the Southern
2023year3month23day · In Southern Africa, for example, the use of cyanide for large-scale gold extraction began in 1890, and prior to that used Hg (Fivaz 1988). In many tropical regions, ASGM is the dominant estimated source of atmospheric Hg emissions, accounting, for example, for 70% of Hg emissions in sub-Saharan Africa and 83% in South America
