A rise of 5C would be a temperature the world has not seen for 30 to 50 million years. We've been around only 100,000 years as human beings. We don't know what that's like.

There is still time to avoid the worst impacts of climate change, if we take strong action now.

Give up meat to save the planet.

Climate change represents the greatest and widest-ranging market failure ever seen

If you look at all the serious scientists in the world, there is no big disagreement on the basics of this...it would be absolute lunacy to act as if climate change is not occurring.

Adaptation is a vital part of a response to the challenge of climate change

Looking back, I underestimated the risks. The planet and the atmosphere seem to be absorbing less carbon than we expected, and emissions are rising pretty strongly. Some of the effects are coming through more quickly than we thought then.