This is very interesting.
http://tinyurl.com/c978q
Technology to Recover Water
From Vehicle Exhaust Fumes
Would Aid Frontline Troops
By J. LYNN LUNSFORD
Staff Reporter of THE WALL STREET JOURNAL
October 4, 2005; Page A17
Keeping an army provisioned in the desert is a ballet of logistics, particularly when it comes to supplying two vital liquids: diesel fuel and water.
Now, using technologies developed for the space program, the U.S. Army is conducting an experiment that could convert the exhaust pipes of military vehicles into water fountains.