Convention calls on ban on usage of mercury

He said its concern arose from the history of mercury pollution and that total anthropogenic emissions of mercury in 2010 were 1960 tonnes with 37 per cent of the emissions coming from small scale gold mining alone, adding that, “the sub-Saharan African contributed 16.1 per cent of global mercury emissions with the artisan mining being the largest contributor”.
http://www.ipen.org/news/convention-calls-ban-usage-mercury