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I think there is a degree of speculation that is satisfied the climate is changing.

I have been one of the guys who have been skeptical of global warming from the beginning. The jury is obviously still out on it. We see nothing but conflicting reports from across the globe. I'm not sure; I'm not a scientist.

In the 1970s, the scare was about global cooling.

You always have to be worried about something that is considered a so-called 'scientific theory' that fits every scenario. Climate change, as they've defined it, can never be disproved.

It is baffling, I must say, that in our modern world we have such blind trust in science and technology that we all accept what science tells us about everything - until, that is, it comes to climate science.

Back in the '70s - I remember the '70s: we were told there was global cooling. And everyone was told global cooling was a really big problem. And then that faded.

Once upon a time, I was a climate-change skeptic.

The idea that we have the capacity to change or stop the climate, I'm just skeptical.

How is it that, in the face of overwhelming scientific evidence, there are still some who would deny the dangers of climate change? Not surprisingly, the loudest voices are not scientific, and it is remarkable how many economists, lawyers, journalists and politicians set themselves up as experts on the science.

I would be absolutely astounded if population growth and industrialisation and all the stuff we are pumping into the atmosphere hadn't changed the climatic balance. Of course it has. There is no valid argument for denial.