I suppose we could bungy it off a ridge - that would be green
The requirement is
The RAF is searching for its next generation of light flying training aircraft that must be more environmentally friendly and produces a zero carbon emission at the point of use
I'm afraid the bungy method produces carbon at the point of use, those hanging on and stretching the bungy. Detail, detail, sorry to be a spoil sport.
Must be a way though, if a UK power station can go from burning coal to shipping in timber from the US and burning that and be considered carbon neutral........