http://www.youtube.com/watch?feature=player_embedded&v=3OWj1ZGn4uM
The components controlling the flow of electricity in mobile phones are composed of the refined mineral known as Coltan. With more and more people using mobile phones the demand for Coltan has increased significantly.
Mobile phones fuel Congo conflict
The largest reserves of Coltan are to be found in the Democratic Republic of the Congo, and much of the finance sustaining the civil wars in Africa, especially in the Democratic Republic of the Congo, is directly connected to Coltan profits. Coltan is extracted under terrible working conditions in mines in Eastern Congo.
The United Nations reports child labour in Africa has significantly increased in Coltan mines. In some regions of the Congo, about 30 percent of schoolchildren are now forced to work in the mines.