The flight problem isn't really a FLIGHT problem: it's about energy. Is it possible to create a zero-carbon source of energy, or, maybe, an accumulator good eno

The flight problem isn't really a FLIGHT problem: it's about energy. Is it possible to create a zero-carbon source of energy, or, maybe, an accumulator good enough to power the flight of commercial aircraft? We've already seen that for cars it is possible (Tesla), so now it's time for the next step.