The most direct pathway, however, is the inhalation of mercury vapours created during the burning process. An immediate toxic exposure to miners and their families are most affected by these noxious vapours. A study of artisanal gold mining in Peru concluded that for every gram of gold that is produced, at least two grams of mercury are emitted into the atmosphere.
http://www.myjoyonline.com/opinion/2017/March-29th/chemicals-used-in-galamsey-their-effects-on-aquatic-life-environment-human-life.php
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