Where it is found:  Products & equipment such as thermometers, dental fillings, electrical equipment, and light fixtures and the in the natural environment. 

Releases into the environment:

• From natural sources such as soils, oceans and volcanoes
• From human products and equipment 
• Through processes such as fossil fuel combustion, creation of new reservoirs, incineration of municipal, medical and hazardous waste, and gold and ore mining

Some mercury can move into the atmosphere and be transported long distances before being deposited on earth. Mercury emitted in one country can therefore be transported and deposited in another.