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.

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.

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

The only way you multiply resources is with technology. To really affect poverty, energy, health, education, or anything else - there is no other way.

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 right way to build a company is to experiment in lots of small ways, so that you have plenty of room to make mistakes and change strategies.

Everybody else is afraid to fail. I do not really care because when I fail, I try something new.