We thought we knew 20 years ago. That led to some alarmist books – mine included – because it looked clear-cut, but it hasn’t happened. The climate is doing its usual tricks. There’s nothing much really happening yet. We were supposed to be halfway toward a frying world now. The world has not warmed up very much since the millennium. Twelve years is a reasonable time. The temperature has stayed almost constant, whereas it should have been rising - carbon dioxide is rising, no question about that.

For each of our actions there are only consequences.

You never know with politicians what they are really saying. And I don't say that in a negative way-they have an appalling job.

I've got personal views on the '60s. You can't have freedom without paying the price for it.

We live at a time when emotions and feelings count more than truth, and there is a vast ignorance of science

Climate change now represents so urgent a threat to mankind that the only way to deal with it is by suspending democracy.

If we gave up eating beef we would have roughly 20 to 30 times more land for food than we have now.