In the two years I have remaining as president, I'm going to make sure that we follow through.

There are signs that the age of petroleum has passed its zenith. Adjusted for inflation, a barrel of crude oil now sells for three times its long-run average. The large western oil companies, which cartellised the industry for much of the 20th century, are now selling more oil than they find, and are thus in the throes of liquidation.

No, but way before that, I've been doing little dances in movies for years. Yeah, that was an amazing chance. You know, at my age to be able to do a music dance video, very unusual.

The older generation had greater respect for land than science. But we live in an age when science, more than soil, has become the provider of growth and abundance. Living just on the land creates loneliness in an age of globality.