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.

There's a huge wave of anti-establishment feeling. There's an enormous amount of anger. And it's collapsing governments and political movements across the world right now.

There are two outstanding issues in democratic politics these days. One is the relationship with the media, which is now 24/7, and operates with a completely different intensity than even 15 or 20 years ago. How do we have a proper conversation between leaders and country when it's moderated sometimes in a very partisan and inflammatory way? And the second thing is the effectiveness of our democracy. How do we get the right gene and talent pool in politics?

All new schools...should be models for sustainable development: showing every child in the classroom and the playground how smart building and energy use can help tackle global warming...Sustainable development will not just be a subject in the classroom: it will be in its bricks and mortar and the way the school uses and even generates its own power.

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.

When my parents were growing up the world's population was under three billion. During my children's lifetime, it is likely to exceed nine billion. You don't need to be an expert to realise that sustainable development is going to become the greatest challenge we face this century

So actually I only got a mobile phone the day after I left being Prime Minister.