There will never come a time when worldwide fuel is exhausted. Yes, there is a finite amount of oil on the planet, but fuels can be made synthetically. This has been the case for more than 60 years. So, why the hype about oil? Because of cost. Oil is cheap and has been cheap historically compared to synthetic fuels, but that does not mean that you can not fabricate the alternatives. Will depletion of oil have an effect on global economy, transportation and the energy sector? Without a doubt, but the world will not stop in any way. Depending on how costs of different fuels in the future develop, it will shape the fuel dependant industries. We can guess all that we want, but the fact of the matter is that only time will tell us where and when the breakthroughs in energy research will come. It is certainly getting more attention as the oil price spirals upwards. So, don't worry so much about the termination of airline transportation. In my view, the pilotless aircraft is a greater threat to this cosy job, but that is a different matter. I have a feeling, though, that I won't be allowed to retire before I hit 70