Global warming and rising fuel prices are some of the reasons we’ve been talking a lot about fuel efficiency recently. The most significant human activity that contributes to global warming is the burning of fossil fuels. So for now, we are looking for alternative fuel for our vehicles to help our mother earth. How about NASA’S Moon Rocket? How much fuel did it take to get to the moon? In other words, how fuel efficient was the moon rocket? This is really an eye opening stuff. Watch his clip.