Going green makes military sense to the U.S. Army. Self-sufficient vehicles and base camps require fewer supply convoy runs that stretch logistics lines thin across hostile territory. The Army's new "zero-footprint" concept for a camp includes a package of very cool technologies.
Soldiers could eventually obtain their drinking water from vehicle exhaust, based on water-purification technologies being developed by the U.S. Army's TARDEC and DARPA labs. Garbage and waste produced by camps could also become new sources of energy.