I just used to have a really normal life, working in an office.

It's amazing how resourceful you can become when you're in the middle of the ocean and there's only one way to get to the other side.

I'm not claiming to be anything out of the ordinary. I am not especially big or strong or brave or intrepid.

Like riding a bike for the first time, sometimes you just have to go for it. If you keep looking forwards and maintain your momentum, it will probably go well. But if you start to doubt yourself and look back, you are more likely to suffer a major wobble followed by a crash.

So let's raise the tone of the debate. Too often at the moment we look like schoolchildren squabbling over a toy - our most precious toy, the Earth. And the danger is that as we pull in opposite directions in our global tug of war, the Earth will end up broken - or at least unable to sustain human life. That is the worst case scenario - or maybe, from the Earth's point of view, the best.

I have learned to accept that, in the present moment at least, things are exactly as they are meant to be, and although I cannot control the future any more than I could control the wind and the weather, I can manage it and influence it in a positive way.

I just used to have a really normal life, working in an office.