Power lines

New energy from old sources

September 18, 2006

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.

  • Oil wellsMixed 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
  • Big Stone Power plantCoal 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
  • The proposed Mesaba Energy siteGasification 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
  • Floor boardDull, old, unloved and still the best way to save energy dollars
    Conservation advocates struggle to make their case as public attention focuses on flashy new energy alternatives. But some Minnesotans find conservation is an energy source.June 28, 2006
  • Big cornstalkEthanol 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
  • Iogen cellulose ethanol plantEthanol 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

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