New Technology
Advanced methods of locating and extracting crude mean that new sources could one day pump out nearly as much oil as some of the older sources produce today.

Global Downturn
An economic slowdown could put the brakes on demand and bring prices down.

Slowing Consumption
Global oil consumption is rising, thanks to developing countries like China and India, but these economies are becoming more serious about shifting to alternative energy sources.

Oil Exploration
Far-flung prospecting in places like the Arctic Ocean, Brazil, and the Gulf of Mexico will lead to an increased supply.

Ethanol Subsidies
By 2012, the U.S. is expected to spend $92 billion in subsidies for ethanol. An abundant supply of ethanol could eventually curb demand for oil.

Gas Alternatives
It's not just ethanol that's revving up to rival oil as the fuel of choice. Natural gas, nuclear power, and synthetic crude have become increasingly popular and are in plentiful supply.