The Energy Problem — Its Effect on Aircraft Design: Part 4 — The Unforecastable Future

In previous articles in this series, an effort has been made to foresee the trends over the next two decades. In this last article, some aspects are discussed where prediction is virtually impossible, and the most one can do is to speculate. One thing only is quite certain; that is that one day all fossil fuels will be exhausted and that we shall then have to rely on alternative ‘everlasting’ sources. The big doubts are what these alternatives will be, and how long the period is before exhaustion of fossil fuels occurs.