Beginning of Essay
Hydrogen in it's liquid form has been used in space vehicles for years. Hydrogen has a high combustion energy per pound relative to any other fuel, meaning hydrogen is more efficient on a weight basis than fuels currently used in air or ground transportation. Hy ....

Middle of Essay
.... efficiency of this method is about 65 percent, however 80-85 percent are possible with more research. Another method of producing hydrogen is through chemical means. It is a scientific fact that every metal that is less noble than hydrogen will isplace hydrogen from water . Common materials used in this reaction is sodium or potassium . Sodium plus water will produce hydrogen , NaOH, and heat . Other reactions include the "producer" reaction that was discovered in 1800 . It involves combining heat, carbon, and water. It then yields hydrogen an carbon monoxide . Bacteria can also be a hydrogen producer. Bacteria and other microorganisms may releas ....