You get these insurgent movements of populism, left and right. An insurgent movement of populism took my political party over in the UK for example.

I had no intention of returning into the British political debate, really at all, even though I've obviously got very strong views on it, until Brexit happened, because I think Brexit is a destiny-changing decision for my country.

We need to develop the new green industrial revolution that develops the new technologies that can confront and overcome the challenge of climate change; and that above all can show us not that we can avoid changing our behaviour but we can change it in a way that is environmentally sustainable.

The first big choice: a government with the strength to deliver stability, or a government that takes the country back to boom and bust.

Whatever the dangers of the action we take, the dangers of inaction are far, far greater.

There is no doubt that the time to act is now. It is now that timely action can avert disaster. It is now that with foresight and will such action can be taken without disturbing the essence of our way of life, by adjusting behaviour not altering it entirely.

I also, as I think most people do, have a healthy instinct that if we upset the balance of nature, we are in all probability going to suffer a reaction. With world growth, and population as it is, this reaction must increase.