

While prioritizing civilization terrorism is always the first resort, a railway could outlast dead ender energy compared to a pipeline. Quicker/cheaper and able to transport anything of use across the country and to ports for export. New northern routes can mitigate the danger of accidents, and access cheap land that eventually increases population. Expanding Thunder Bay ports for more St Lawrence shipping, and Canadian built ships is a lot of steel use too. Would free up passenger rail traffic in windsor-Quebec corridor.
Delta wing designs will harry a lot of H2. It is suitable for LH2. Carbon fibre reinforced wing tanks. Efficiency is not as bad as other storage processes. Exportable/transportable fuel has huge advantages in monetizing surplus renewables.
I don’t know about this. Vaporization does create a cooling effect, and having some battery can increase takeoff power and be charged during flight. Venting pressure release is an easy option.