As for companies invested in the space - I think its important to distinguish between a good investment and a material climate change technology - you can have the first without the second, even in the "clean tech" space.

The world is hung up on food-based biofuels. Not only are they the wrong thing, they're the uneconomic thing.

I'm not a political person. I'm a techie nerd, and I enjoy the techie part. I mean, all my life, I've loved great technology.

For electric power generation, we are very optimistic about solar-thermal technology, and we’re intrigued by the potential of enhanced geothermal energy to replace coal-based power generation. Traditional carbon capture and sequestration-based coal power generation is somewhat unlikely to be competitive.

Every big problem is a big opportunity.

We don't need a fuel that's cleaner, we need a fuel that happens to be cleaner, but is half the price of oil.

Electric cars are coal-powered cars. Their carbon emissions can be worse than gasoline-powered cars.