Lawmakers are likely to raise alternative fuel costs at Hagel confirmation hearing.

The Department of Defense, a huge consumer of petroleum, is trying to develop biofuels on a large scale as an alternative. Republicans in Congress have voted the program out of an authorization bill, saying oil and even coal can meet the military's needs.

Two hearings in the House this week will question whether the Pentagon's efforts to go green are worth the cost.

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This week Marketplace airs a special series on the U.S. military and energy, and the quest to "unleash us from the tether of fuel." When Pent…

This week Marketplace airs a special series on the U.S. military and energy, and the Pentagon's quest to "unleash us from the tether of fuel." This…

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