Guardian: The search for an environmentally friendly fuel for airplanes took a leap forward today with the world’s first flight powered by a second-generation biofuel, derived from plants that do not compete with food crops. An Air New Zealand jumbo jet left Auckland just before midnight GMT with a 50-50 mix of jet fuel and oil from jatropha trees in one of its four engines. The two-hour test flight, which took the Boeing 747 over the Hauraki Gulf, showed that the jatropha biofuel was suitable …