Some of the richest and most powerful men in the world are gathering in London tomorrow to discuss how to help the world's poorest countries adopt climate change policies.

The UN aims to raise $100bn a year for the rest of this decade to fund the changes in poorer countries.

Professor James Lovelock, who developed the Gaia theory that the Earth functions as a giant, self-regulating organism, gives his opinion of how climate change will change the planet.