February 2015
Volume 67    Issue 2

2014 Arizona conference draws more than 500 attendees

Mining Engineering , 2015, Vol. 67, No. 2, pp. 24-24
Gleason, William


During the past nine years the number of cellular phones connected to a network has increased from 34 percent of the world’s population in 2005 to 93 percent in 2014. These phones are powered by a combination of materials including elements such as gold, silver, copper and rare earths. And, as more parts of the world become connected to networks, the number of phones being produced, and the elements they will need, will continue to increase.

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