But this story is much more than about household energy use.

This thing is actually part of the solution, right?

Yeah, taillight matches any 2004 to 2009 Prius.

So this is footage from our Google self driving car, which you might have heard about.

I believe these are the best robotic cars out there today.

Another technology that we see all around us out here is hybrid cars.

So if you're sitting there stressing about large cap versus small cap, or company A versus company B, or should you buy the Subaru or the Prius, you know what, let it go.

Now if we could scale this, you could actually use it to run your Prius, which is kind of my dream to be able to drive a virus powered car.

I'm going to do the environmentally right thing, I'm going to buy the Prius, 50 miles per gallon.

But lists like this become kind of numbing, so let me just say this if you're a progressive, if you're driving a Prius, or you're shopping green, or you're looking for organic, you should probably be a semi vegetarian.

If you think about what makes the Toyota Prius so successful, my non scientific observation is that when you watch people who drive Toyota Priuses, they smile more than other people.

In the San Francisco Bay Area not only do you have the highest concentration of Priuses, but you also have the perfect range extender.

Two percent isn't 20 percent, but in the car business, which is slow moving, that's huge that's arrival.

And if you look at the trends here, by about 2008 and I don't think this is a crazy forecast they'll be two percent of auto sales.