You're never going to get the amount of CO2 emitted to go down unless you deal with the one magic metric, which is CO2 per kilowatt-hour.

With nuclear weapons, you'd think you would probably stop after killing 100million. Smallpox won't stop. Because the population is naïve, and there are no real preparations. That, if it got out and spread, would be a larger number.

The need to communicate effectively with your customers will come up again and again.

You might say, well, aren't people saying that about wind and solar today? Not really. Only in the super-narrow sense that the capital costs per output, when the wind is blowing, is slightly lower.

There were a lot of missteps in the early days, but because we got in early we got to make more mistakes than other people.

Patience is a key element of success.

Improving the health & productivity of the poorest is one of the best investments you can make in the future of the world