[Aaron]

...every problem looks like a nail.

$this->bbcode_second_pass_quote('', '"')Given the efficiency and environmental benefits of emerging fuel cell technology, Boeing wants to be on the forefront of developing and applying it to aerospace products," said Francisco Escarti, BR&TE managing director. "The Fuel Cell Demonstrator Airplane project is an important step in that direction."

[IslandCrow]

$this->bbcode_second_pass_quote('', 'A') fuel cell is an electrochemical device that converts hydrogen directly into electricity and heat without combustion. Fuel cells are emission-free and quieter than hydrocarbon fuel-powered engines. They save fuel and are cleaner for the environment.

[nemo]

$this->bbcode_second_pass_quote('IslandCrow', '
')
I suppose if you compare the volume of hydrogen needed... to the volume of aviation fuel normally used this statement could be true.