A woman was going round the neighbourhood door-to-door, trying to make homeowners aware of the threat from climate change. At one house, she said to the man who answered the door: "Do you have any idea of the size of your carbon footprint?" "I don't have a carbon footprint," he answered. "I drive everywhere." Al Gore says that global warming is more serious than terrorism. Unless the terrorist is on your plane, when that extra half a degree doesn't bother you so much. Jay Leno