Planes can't fly on renewables!

The Zephyr
flew 3.5 days non-stop.
I'm not saying that this is the future of air-transportation but it
shows that flying a plane does not require kerosene.

The Zephyr
flew 3.5 days non-stop.
I'm not saying that this is the future of air-transportation but it
shows that flying a plane does not require kerosene.