Other Natural Resources: Metals
I have surprisingly few (considering my geology background) sources on this key topic, but I will be adding others.
Scarcity of metal minerals: June 2009 presentation by Dr. Andre. Diederen that tracks alarming drops in supplies of most key metals; cause is linked to energy supply and cost.
Minerals scarcity: May 2009 post by Dr. Andre Diederen starts "If we keep following the ruling paradigm of sustained global economic growth, we will soon run out of cheap and plentiful metal minerals of most types."
China to limit exports of rare metals? Brief news item from August 2009; this will play out in the fall, and the rest of the world is paying close attention.