Nor can you make a hydrogen plane with current (compressed hidrogen) technology, its tanks would be much too bulky and heavy. Unless you are proposing to transf

Nor can you make a hydrogen plane with current (compressed hidrogen) technology, its tanks would be much too bulky and heavy. Unless you are proposing to transform planes into some sort of foam-covered Space Shuttle external tanks storing liquid hidrogen, our best bet for carbon neutral flight is some sort of fuel synth or biofuel.