|SClearly future demand growth is an important
variable in determining future supply needs.
|SU.S. demand more than tripled in the 50 years
from 1950 to 2000, fueled by transportation, which went from just over half
of petroleum demand in 1950 to over 2/3 of demand by the year 2000.
|SBut will such growth continue in the future,
and what might change that pattern?