I used to hunt as a child but gave up the chase in my 'Ho Ho Ho Chi-Minh, we shall fight and we shall win' chanting and marching days - by which time I had come to share Oscar Wilde's feelings about 'the unspeakable in full pursuit of the uneatable.'

It is easy enough to hold an opinion, but rather more testing to act on it.

I was a reluctant convert, and I am by no means a zealot. But the evidence is compelling: to write off wind-power is either ill-informed or dishonest.

I am now certain that we have no alternative but to reduce urgently the levels of carbon that we are still pumping into the atmosphere as though tomorrow simply didn't matter. If we don't act collectively and individually, our children and their children will reap a whirlwind which will obliterate their civilisation.

As a young man, causes of one kind or another engaged me, and I thought the media is where you express yourself in that. I lived with the illusion, for quite a long time, that if you described something accurately, something would be done about it.

Anyone who thinks that you become a journalist or broadcaster in order to be a wallflower needs to think again.

Until I was 21, I wasn't going into the media. I was a professional show jumper; I was going to have a farm... Then my father died, and it changed my life. I realised I had to have a go at being a journalist to see if I could cut the mustard.

As it is, the grotesque distortions of the global market mean that for every dollar the West dispatches to Africa in the form of aid, two dollars are clawed back through subsidies and tariff barriers: a monumental rip-off by the rich as they instruct the poor to accept 'free' trade or else.

In the world in which we live, truth is an ancillary virtue, but it shouldn't be.

I don't love the media. I'm part of it, but you can't love a porcupine.