TerraChoice also measured green advertising in major magazines and found that between 2006 and 2009, the number mushroomed from about 3.5% of all ads to just over 10%; today, Case says, the number is probably higher still.
NASA bought hydrogen at 98 cents per gallon. A gallon of liquid hydrogen weighs 0.2679 kg, so they paid $3.66 per kg for liquid hydrogen. NASA bought oxygen at 67 cents per gallon. A gallon of liquid oxygen weighs 4.322 kg, so they paid $0.16 per kg for liquid oxygen. 384,071 gallons of liquid hydrogen in the external tank of the shuttle, for a cost of $376,389.58. ~141,750 gallons of liquid oxygen for a cost of $94,972.50. The total cost of all propellant for rocket fuel is $1,380,000. These numbers exclude the hydrogen and oxygen used for cooling, etc.
It has three times more energy than petrol per unit of weight, and when it burns, it produces nothing but water. âOur new hydrogen storage materials offer real potential for running cars, planes and other vehicles that currently use hydrocarbons.â. The fuel is expected to cost around $1.50 a gallon, or 19p a litre. Even with fuel taxes, the forecourt price is likely to be around 60p a litre â less than half the current cost. That would bring the price of filling a 70-litre Ford Mondeo down to around Â£42.