Comment trains and buses works quite OK (Score 1) 359
For intra-Europe travel, we will do quite fine, yes. Intercontinental travel will be much harder, but at least travel to US had already declined, in part because people don't want to risk getting randomly detained.
But yes, we already had similar situations - for example when the EyjafjallajÃkull eruption closed air space. Trains will be crowded, long-distance buses will have a boom time. The night trains will be very sold out. Some people will probably drive. Some conferences may have to be re-scheduled because of longer travel times, or go digital. But we will manage. Travel within Europe can work quite OK without air travel.
Fossil gas dependency is another matter - some countries still rely on it for heating and industry, and we don't want to buy Russian gas for obvious reasons. It was replaces with LNG, imported from Gulf countries or the US. The best we can do now is probably lowering temperatures a bit in homes, starting insulating better for the winter, and in general help central Europe getting heating less dependent on gas, as we already have in Northern Europe. When we can cope with only gas from Norway / the UK, we would have better resilience, but of course zero fossil gas would be even better.