Date Added: May 2009
While the world isn't necessarily running out of oil, it is running short on cheap oil. At the same time, demand for oil is rising in Asia, China and India because more residents are driving automobiles. In addition, the countries that export oil to the U.S. - such as Russia, Iran and Saudi Arabia - have the potential to use their reserves to work against democracy. The primary alternative to oil is ethanol, which can come from corn, sugar, or "switch grass, which is the most promising source," Mandelbaum said. "But techniques are not yet advanced enough to make switch grass commercially viable."