Oil replacements and then efficiencies in engines and housing and the way we build houses is a very interesting market.

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

I generally disagree with most of the very high margin opportunities. Why? Because it's a business strategy tradeoff: the lower the margin you take, the faster you grow.

The first rule of venture capitalism is hands-on experience. You have to get your hands dirty.

I've probably failed more often than anybody else in Silicon Valley. Those don't matter. I don't remember the failures. You remember the big successes.

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.

It doesn't matter what your probability of failure is. If there's a 90% chance of failure, there's a 10% chance of changing the world.