The fuel cell is just a fundamentally inferior way of delivering electrical energy to an electric motor than batteries.

Fear is a hard thing to deal with. I feel it quite strongly. If I think something is important enough, I'll make myself do it in spite of fear. But it can really sap the will. I hate fear, I wish I had it less.

Physics is a good framework for thinking. ... Boil things down to their fundamental truths and reason up from there.

We're running the most dangerous experiment in history right now, which is to see how much carbon dioxide the atmosphere can handle before there is an environmental catastrophe.

A Prius is not a true hybrid, really. The current Prius is, like, 2 percent electric. It's a gasoline car with slightly better mileage.

I don't think it's a good idea to plan to sell a company.

I do love email. Wherever possible I try to communicate asynchronously. I'm really good at email.