Stefan Schneider and his team at Air Force Research Laboratory, California, will use green rocket fuel made of rich ionic-liquid hydrogen that can produce the same propelling force but also emits less corrosive and toxic chemicals than conventional rocket propellants.
AlternativeEnergyEcogreen <http://alternativeenergyecogreen.blogspot.com/2011/05/ionic-liquid-hydr\ ogen-rocket-fuel.html>
