Is this just another scary scenario being issued in advance of the Sustainable Development jamboree?
Hardly out of the blue. A growing number of experts in the field are predicting a peak in world wide oil production in the near future, just as U.S. production peaked in 1970 and has declined ever since.
For example, see here
http://www.hubbertpeak.com/aspo/iwood/ASPOpress_2.pdf
Or look at some of the work by Matt Simmons--one of the poeple who advised the Bush administration on energy. For example here:
http://www.simmonsco-intl.com/domino/html/research.nsf/0/35776d8b19ec44ba86256b68006ae823/$FILE/CERI.pdf
The argument that it never happened before so therefore it can't happen now is not very convincing.