"Oil, the Dwindling Treasure"
by Noel Grove, Photographs by Emory Kristof
National Geographic, June, 1974


"'THE END OF THE OIL AGE is in sight,' says U.S. petroleum geologist M. King Hubbert.... If present trends continue, Dr. Hubbert estimates, production will peak in 1995 -- the deadline for alternative forms of energy that must replace petroleum in the sharp drop-off that follows."