A comprehensive, independent study could help inform policy in this area. The serious health and environmental impact of exposure to mercury have long been known, yet substantial quantities of mercury are released to the environment, mostly in artisanal and small-scale gold mining. A considerable number are employed in this activity and many miners lack feasible alternative employment. Its aim is to build institutional capacity for GHS implementation in the priority sectors of agriculture, transport, consumption and labour. Companies involved in Colombian implementation of Responsible Care, a global voluntary programme by the chemicals industry (Section 3.7), have also started to use the GHS for products they market. In Colombia, regulations on the transport of hazardous goods, and on industrial hygiene and safety, also require SDS to be made available to persons involved in transporting hazardous chemicals.