While the world waits for the 10X battery, a safe, long-range source of flight for our post-Green Flight Challenge fliers, we will probably have to go aloft powered by some bio-fuel derivative or combination of “traditional” fossil fuels and biofuel. Major players in the airline industry are responding to the probability that things will get a bit thin in finding ready, cheap sources of sweet crude, and are taking on not only the issue of using green energy, but of flying more efficiently – ala Green Flight Challenge practices and Voyager-type voyages. This interest by the big players in the industry will probably be good for continuing fuel sources for general aviation, too. With more activity than can be imagined …