Billions of people could be wiped out over the next century because of climate change, a leading expert said. Professor James Lovelock, who pioneered the idea of the Earth as a living organism, said as the planet heats up humans will find it increasingly hard to survive. He warned that as conditions worsen, the global population which is currently around 6.5 billion, may sink as low as 500 million. Prof Lovelock also claims that any attempts to tackle climate change will not be able to solve the problem, merely buy us time. Given the dire situation we face, he urged...