Global annual mercury production was at its peak in 1971 and has since significantly decreased. In 2005, UNEP estimated global annual mercury demand at be- tween 3,000 and 3,900 tonnes (UNEP, 2006). Demand has fallen significantly in the last 50 years, from 9,000 tonnes a year in the 1960s to 7,000 in the 1980s and…