Saw this today and had never thought of this set up before with natural gas and electric as a hybrid. makes some sense.
"The second part of Pickens' plan - using natural gas to power vehicles - is perhaps easier.
While automakers are betting on electric cars as the vehicle of the future, those electric cars will still need backup engines to recharge the battery on long trips, at least for the foreseeable future.
Those backup engines could run on natural gas, said Julius Pretterebner, a vehicles and alternative-fuels expert at Cambridge Energy Research Associates.
Pretterebner also pointed to a host of other reasons why natural gas in cars is a good idea: It's about half as expensive as gasoline and 30% cleaner; the infrastructure to get it to service stations already exists; it's relatively cheap to convert existing cars ($500 to $2,000 per car, he said); and natural gas can be carbon neutral, if it's made from plants, a process he said requires no new technology.
"It's maybe the best alternative fuel we have, and the quickest way to get off foreign imports," he said."