oh gotcha. To me it's all in the same. Some engineered alternative that produces less carbon. it's terribly semantic though because every fuel today is engineered to produce less emissions.

Right, agreed - it's an improvement over what we currently use! From what I read E-fuel is very expensive to produce, so I was surprised by the possibility of airplanes switching to it.

Sounds more feasible than electric planes though. That never made viable sense to me. At least they could build a 737 sized alternative fuel plane today.