It seems kind of crazy, because natural gas is about half the price of gasoline (on a per gallon basis) right now.

FORBES: New Honda Civic Will Be Only Consumer CNG Car In America

While windmills cannot power cars directly, motor gasoline accounts for less than half of the consumption of petroleum products in America, so if wind reduces only non-vehicular use of petroleum it will still reduce reliance on petroleum products from the Middle East.

ECONOMIST: Regulating radio

While Earth-Policy says that hybrids could slash U.S. gasoline use in half, it also points out that the same usage of plug-in hybrids over the same period of time could result in gasoline usage being cut by 70 percent.

CNN: All About: hybrid transportation

According to Earth-Policy.org, if the United States replaced its entire fleet of passenger cars with "super-efficient" hybrids such as these over the next 10 years, gasoline use would be slashed in half.

CNN: All About: hybrid transportation

In the two and a half weeks since he first floated this idea in Pennsylvania, gasoline prices have already risen more than 20 cents a gallon.

NPR: 2 of 3 Presidential Hopefuls Back Gas Tax Holiday

The additive made up 11% of California gasoline by volume, but only half that volume can be replaced by ethanol, forcing refiners to produce an extra 100, 000 bbl. a day of gas to meet demand.

FORBES: $2 Gas? We Love It

Gasoline drove about half of that increase, with food and clothing accounting for much of the rest.

FORBES: Gold Stocks Have Not Been As Good As Gold But That's Changing

President BUSH: At the same time, we need to reform and modernize fuel economy standards for cars the way we did for light trucks and conserve up to eight and half billion more gallons of gasoline by 2017.

NPR: Fact-Checking the State of the Union Speech