Aircraft use a lot of fuel. Has it become easier or more efficient to produce hydrogen? I thought this was an obstacle for mass producing cars that run off hydrogen cells? How are they going to store all this hydrogen at each major airport? Will this mean a fully loaded plane will be able to land right after it takes off without dumping fuel?
A climate-related problem with jet planes - which unfortunately hydrogen doesn't solve - is inversion traces, which serve as a greenhouse layer.<p>Turboprops don't have this problem, as I understand.