For millennia, humankind has exploited the Earth without counting the cost. Now, as the world warms and weather patterns dramatically change, the Earth is beginning to fight back. James Lovelock, one of the giants of environmental thinking, argues passionately and poetically that, although global warming is now inevitable, we are not yet too late to save at least part of human civilization. This short book, written at the age of eighty-six after a lifetime engaged in the science of the earth, is his testament.