The U.S. is looking for new energy from old sources. In the Midwest, two of the biggest energy kings are coal and corn. There are new challenges to those popular energy sources.
Mixed signals on energy policy As U.S. consumers grapple with their dependence on foreign oil, the country is also sorting out its priorities in a national energy policy.September 18, 2006
Coal is back; so are concerns over pollution Utilities are embracing coal as a plentiful, relatively cheap source of energy. But environmentalists say coal-fired power plants
remain a major source of air pollution.September 19, 2006
Gasification may turn coal into 'clean' fuel Some energy experts say America should turn to coal as its main source of energy. But coal produces pollution. How to overcome that dilemma? The answer might be found in a new power plant planned for northern Minnesota.September 20, 2006
Ethanol vs. water: Can both win? In Minnesota, ethanol is a favorite among alternative energy advocates. But some scientists say it is a drain on Minnesota's water resources.September 18, 2006
Ethanol makers search for cheaper raw material There could be a major change underway in how ethanol is made. Several companies want to start producing the alcohol fuel from plant fiber. Most ethanol now is made from corn. How likely is the transition to what's called cellulose ethanol?September 22, 2006