A Continental 737 successfully tested a 50-50 mix of Jet-A (standard jet fuel) and biofuel made from algae in one of its engines. The Houston Chronicle has the story. This development excites and encourages me. As much as I love being able to fly all over the world, I also know that airlines burn huge amounts of fuel, which is refined from oil. A 1-hour flight on a 737 burns nearly 750 gallons of fuel. If we can make some of that fuel from biological sources such as algae, the environmental impact would be huge.