Resistance to change is always the biggest obstacle.

I like to take folks back to the turn of the century when people said 'gas cars can never replace horses because you can feed horses at your house, you get along with them, they're nice.'

I think China is set up to surpass the US on the even more critical industry of green power.

I'm sure the gasoline companies would love to keep their 100 percent monopoly on transportation fuel.

What oil companies don't want you to know is that refineries use a huge amount of electricity in refining gasoline. And that's usually not even figured into reports about gas cars' overall energy use.

Oil companies earned a permanent enemy in me when they messed with the electric car the first time around, and I think they continue to do a disservice in making it seem like fossil fuels are cheaper than they really are in terms of total cost.

Obviously the horse can still do things that the gas car can never do, and the gas car will always be able to do things the electric car can't do. But they have really different uses and advantages.