Billionaire Texas oil man makes big bets on wind

On the east-west axis from Texas to California would be large arrays of solar generation, which could send electricity into growing Southern California cities like Los Angeles.

The end result would be to free up more clean-burning natural gas - primarily a power-generation fuel now - to power automobiles.

Major oil companies have embraced so-called natural gas liquids because they have spent billions of dollars building refineries and pipelines to turn crude oil into gasoline, Pickens said.

But shifting natural gas used in power generation to transportation needs could cut U.S. crude oil imports by nearly 40 percent, he said.

(Reporting by Chris Baltimore; Editing by Marguerita Choy)