BBC NEWS | Science/Nature | When the last oil well runs dry
Just as certain as death and taxes is the knowledge that we shall one day be forced to learn to live without oil.
Exactly when that day will dawn nobody knows, but people in middle age today can probably expect to be here for it.
Long before it arrives we shall have had to commit ourselves to one or more of several possible energy futures.
And the momentous decisions we take in the next few years will determine whether our heirs thank or curse us for the energy choices we bequeath to them.