Peak Oil

There is limited amount of oil in the ground and eventually it will all be consumed.
http://arabnews.com/economy/article473059.ece

There are alternative energy sources such as Thorium.
http://enveconomics.blogspot.com/2011/07/thorium-as-energy-source.html

http://peakoil.com/

http://www.energybulletin.net/stories/2011-07-11/peak-oil-review-july-11

http://www.theoildrum.com/node/8044

http://joneri.blogspot.com/2011/07/peak-oil-in-house.html

http://peakoilupdate.blogspot.com/2011/07/continuing-fukushima-impact-on-oil-and.html

http://endofcrudeoil.blogspot.com/2011/07/libyan-rebels-repaired-sarir-and-misla.html