In a HARDtalk interview on 29th July, Lyse Doucet talks to James Lovelock. The interview forms part of the BBC's series of programmes on Climate Change.
James Lovelock is revered among environmentalists as the founder of the Gaia theory, which is a serious scientific hypothesis that suggests the planet is one organism, and what we do to one part of it inevitably affects the whole.
He's also controversial because he thinks that the West is so wedded to a sophisticated lifestyle that it's now impossible to reverse the effects of greenhouse gases by using less energy.
He says the only way forward if we want to save the planet is to use nuclear power.
Lyse Doucet asks him what hope there is for the long term survival of the planet.
HARDtalk can be seen on BBC World at 03:30 GMT, 08:30 GMT, 11:30 GMT, 15:30 GMT, 18:30 GMT and 23:30 GMT
It can also be seen on BBC News 24 at 04:30 and 23:30