Empress trees capture roughly 100 tons of carbon per acre per year. But wood's energy density is roughly half that of oil (oil and coal are decomposed algae and

Empress trees capture roughly 100 tons of carbon per acre per year. But wood's energy density is roughly half that of oil (oil and coal are decomposed algae and wood respectively) so it's effectively 50 tons of potential jet fuel per acre of forest per year. A 10 hours 747 flight apparently burns about 250,000 pounds of fuel - roughly 125 tons. So we'd need about two and a half acres of forest for a ten hour 747 flight. There has been some speculation that people could cultivate vats of algae illuminated by blue LEDs emitting light in the optimal photosynthesis spectrum. But this is probably only feasible with effectively limitless supplies of electricity.