Amid soaring fuel costs and diminishing world oil supplies, former Federal Reserve Chairman Alan Greenspan warned that the nation needs to develop alternative energy sources or risk dire economic consequences. "If the world oil industry were to get into very serious difficulty, its impact on the world economic system would be very difficult to absorb," said Greenspan, addressing a crowd at the Aspen Institute's Aspen Ideas Festival.
Greenspan called for a mixture of solutions, from plug-in hybrid cars to ethanol to nuclear power. Greenspan's comments came a day after oil prices reached a record high, pushing above $75 a barrel on the New York Mercantile Exchange. Greenspan also sounded alarms about dwindling natural-gas supplies and the dangers posed by global warming. Greenspan said the nation may also need to develop more nuclear facilities and import more natural gas.