There is a classic short story by Robert Sheckley, the American science-fiction author, which tells of a group of settlers who land on a distant planet. There they begin their work: levelling mountains, changing the atmosphere and ploughing up wild places to make new homes for mankind.Then things go wrong. Overnight, the land rises up and swallows their great earth-moving machines. Storms destroy their newly installed chemical plants. Chains of volcanoes erupt. The planet fights back. In panic, the settlers contact Earth, only to find their own home world, and all the other planets mankind has colonised, are being similarly assailed. Nature has suffered enough indignities at our hands. Humanity is getting the heave-ho.
Sheckley, who died a few weeks ago, was a sci-fi satirist and his tale was merely meant as a joke, albeit a pointed one. Yet I found images of those startled colonists continually popping into mind on reading James Lovelock's latest diagnosis of the state of planet Earth.Just like those sci-fi settlers, humanity is about to get the elbow, it seems. Carbon dioxide is being pumped into the atmosphere at such rates that a point of no return, 'a tipping point', will be reached in a decade or so and global temperatures will abruptly soar. And that will be that, says Lovelock.Icecaps will disappear and, without their reflectivity to bounce the Sun's rays back into space, temperatures will rise even faster. Methane and carbon dioxide, currently trapped in frozen tundra, will then be released, leading to further warming. Dozens of other feedback cycles will be disrupted. Our planet will burn like a crisp and, along with it, civilisation. Humanity, returned to its former ape-man status, will be lucky to hang on, grunting in the odd, deep cave. 'The world is fighting back,' says Lovelock. 'Like the Norns in Wagner's Der Ring des Nibelungen, we are at the end of our tether, and the rope, whose weaves define our fate, is about to break.'
http://observer.guardian.co.uk/review/story/0,,1707791,00.html