“The days of inexpensive, convenient, abundant energy sources are quickly drawing to a close,” according to a recently released US Army strategic report. The report posits that a peak in global oil production looks likely to be imminent, with wide reaching implications for the US Army and society in general.
Get the Pdf while the gettin' is good: Energy Trends and Their Implications for U.S. Army Installations, 1.2mb. 8 page summary of the report, 75kb.
Can this really be the U.S. Army discussing sustainability:
...energy consumption is indispensable to our standard of living and a necessity for the Army to carry out its mission. However, current trends are not sustainable. The impact of excessive, unsustainable energy consumption may undermine the very culture and activities it supports. There is no perfect energy source; all are used at a cost.