The Hybrid model's price premium is steep, but so are the potential gas savings versus a conventional Silverado.

Mr. Buford said he was not sure if the gas savings would ever pay for the difference.

General Motors and DaimlerChrysler are also offering more mild forms of hybrid electric technology on large pickup trucks, with gas savings of about 10 percent.

Because the biggest gas savings occur at slow speeds, hybrids sometimes disappoint customers who spend much of their time on highways.

For California alone, the state projects annual net gas savings of more than $1 billion by early next decade.

The administration projects 10 billion gallons of gas savings over nearly two decades, about what is consumed in 25 days.

"Gas consumption" calculators that translate "miles per gallon" to a measure of "gallons per mile" can help car buyers see the gas savings from their trade ins.

WKQC also claims to be Charlotte's first eco-friendly station that boasts a promotions fleet of gas saving and flex fuel vehicles.

Fertilizer inputs and transportation of biomass across large distances can reduce the greenhouse gas (GHG) savings achieved.

Russia has taken on a role that will bore deeply into its oil and gas savings - but hosting the World Cup has more than a silver lining.