The world's largest consumer of fuel is, believe it or not, the US military. And if you are that big and you use tons and tons of fuel, you better know how to handle your stuff or wastages will come your way. US researchers, bearing this in mind, have developed a system that would save the military fuel by simply filtering diesel. You can find the rest of that story here and while you are at it, you can start thinking what you can do for your country rather than what your country can do for you, aight?