For years, automotive experts have been developing hydrogen fuel cell technology.

Car companies are building and selling fuel cell cars and at the same time Hydrogen fuel providers are building filling stations, but the technology isn’t completely here yet. On Thursday, has been announced that Chevrolet's hydrogen fuel cell will be tested special for USA Army. 
Engineers from GM and the Army’s Tank Automotive Research, Development & Engineering Center are modifying the midsized truck for a grueling 12-month test in which GM engineers and army officials can evaluate the fuel cell’s performance under strenuous use.
Hydrogen fuel cells work by mixing fresh air and compressed hydrogen gas to create electricity, which charges batteries that power electric motors to propel the vehicle. The only byproduct this technology produce is clean water.
The Army also believes that fuel cell cars and their near-silent operation are also ideal for many uses ans circumstances.