If we take all this actions and if it turns out not be true, we have reduced pollution and have better ways to live, the downside is very small. The other way around, and we don’t act, and it turns out to be true, then we have betrayed future generations and we don’t have the right to do that.

Climate change is the world's greatest environmental challenge. It is now plain that the emission of greenhouse gases, associated with industrialization and economic growth...is causing global warming at a rate that is unsustainable.

My view is that we're entering into a situation of enormous instability, insecurity, fragility.

We've seen the reality of Saddam's regime: his thugs prepared to kill their own people, the parading of prisoners of war and now the release of those pictures of executed British soldiers.

I want my son to grow up in a place where the people are more powerful than the government and not the other way around.

Human progress has never been shaped by commentators, complainers or cynics.

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.