OXYGEN ! THE PERFECT FUEL
 TO AN ATOMIC PHYSICIST HYDROGEN MAY BE THE PERFECT FUEL, COMBINING PURE HYDROGEN WITH PURE OXYGEN  DOES RESULT IN PURE WATER.
 FROM A PRACTICAL STAND POINT, HYDROGEN IS FAR FROM BEING A FUNCTIONAL FUEL. HYDROGEN DOES NOT EXIST IN A FREE STATE, BEING BONDED TO MANY OTHER ELEMENTS, MOSTLY OXYGEN, IN THE FORM OF WATER, IT IS PROHIBITIVELY EXPENSIVE TO SEPARATE AND PURIFY AND ONCE PURIFIED, IS DIFICULT AND ALSO EXPENSIVE TO HANDLE, STORE AND TRANSPORT TO EVEN BE CONSIDERED AS A SUSTITUTE FOR OTHER COMBUSTIBLE FUELS.
 OXYGEN, ON THE OTHER HAND, DOES EXIST IN A FREE STATE, AS 20% OF OUR ATMOSPHERE AND IS EASILY, INEXPENSIVELY AVAILABLE THROUGH MOLECULAR FILTRATION  IN EVERY CORNER OF THE PLANET. THIS NON-CHEMICAL PROCESS SUPPLIES MANY THOUSANDS OF RESPIRATORY PATIENTS WITH PHARMACEUTICAL PURE OXYGEN FROM ATMOSPHERIC AIR AT VERY LOW COST, IN THEIR HOMES.
OXYGEN COMBINES READILY WITH MANY ELEMENTS, INCLUDING HYDROGEN OF COURSE AND CARBON, THE TWO COMPONENTS OF GASOLINE ( 83 % CARBON- 17%  HYDROGEN) OR COAL WHICH CONTAINS ALMOST NO HYDROGEN.
THE TOTAL ENERGY OF A FUEL IS PRECISELY DETERMINED BY COMBINING IT WITH PURE OXYGEN IN AN INSTRUMENT CALLED A CALORIC BOMB, IN WHICH TOTAL COMBUSTION OCCURS AND CALCULTED FROM THE RESULTANT TEMPERATURES AND PRESSURES.
 OBVIOUSLY, THE EFFICIENCY OF ANY FUEL WOULD BE OPTIMIZED BY UTILIZING PURE OXYGEN.
 NELSON PATENTED SYSTEMS DOES EXACTLY THAT AND ELIMINATES NITROGEN OXIDES, THE MAJOR CAUSE OF SMOG AND ACID RAIN !!!