NOTHING COSTS MORE THAN IT USED TO:

"The sub-$3 levels for gas prices in the winter really point to the incredible amount of nonconventional gas that has come onto the market the last two years," said Gene McGillian, analyst at Tradition Energy in Stamford, Conn. "Our production levels, our mild winter and the gas we have in storage have combined to crush natural gas prices this month."

Natural gas traded as high as $13 per million British thermal units in July 2008. But in recent years, domestic production boomed, with horizontal drilling techniques and hydraulic fracturing, or "fracking," helping producers unleash a flood of gas from shale formations in Pennsylvania, Arkansas and elsewhere.

Natural gas production in the lower 48 states hit a record 71.3 billion cubic feet a day in October, the U.S. Department of Energy said this week.

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