With the many alternative energy designs and powerplant ideas being tossed around lately, which of todays ideas do you feel will be in use 20 years from now, and why? After the sulfur is reduced in US diesel, I feel we will have a big percentage of hybrid/electric vehicles, achieving 50+ mpg and still being able to carry 8 people, or tow 10,000 lbs. Also, GM's "skateboard" design or whatever its called, will be in widespread use, which I think is to be hydrogen fueled. This uses a common driveline/chassis and can have multiple body styles attached. Someone could, in theory, have a "truck body" and a "small coupe" body and just swap out to the common "skateboard" as needed. Sorta like a plug and play system for transportation. I also feel that small hydrogen refueling/generating full service stations will be in widespread use. This will mean an increase in full service stations, like were in use pre 1980, but with hydrogen. New generations of kids will know the joys of riding their bikes to the local service station for air for their tires, buying a $5 dollar RC cola and a $4 dollar bag of peanuts.