It is the potential for economic growth that provides the basis for the development of countries, for bringing to people essential goods and services, such as water to drink and facilities for healthcare.

I have a great deal of difficulty with those who live in a hugely prosperous country telling people in the developing world that they should be deprived of a critical source of energy.

We obviously want to produce things that people want. We are going to continue to do that in an environmentally responsible way, while still being aware of the physical, scientific, and practical issues that we have to deal with.

In every aspect of life, including the economic dimension, we are always challenged to do the right thing. In many cases in the market system, which allows a great deal of latitude for human choice, people can get carried away to excess.

There's social media where people's politics are out there, they're forwarding articles and seem engaged, but it's only online. We tweet and pat ourselves on the back, thinking we have done something, said we're interested, but it needs more work.

There's a danger in the internet and social media. The notion that information is enough, that more and more information is enough, that you don't have to think, you just have to get more information - gets very dangerous.

I've never been great at social media.

I worked on heads-up displays, virtual-reality technology, and holographic displays - all sorts of really cool technology.