the world's rarest fish; the engineers who are turning carbon emissions to stone; the researchers trying to develop a 'super coral'; and the physicists contemplating shooting tiny diamonds into the stratosphere to cool the earth. Elizabeth Kolbert is one of the most important writers on the environment. Here she investigates the immense challenges humanity faces as we scramble to reverse, in a matter of decades, the effects we've had on the natural world and asks - can we save the natural world in time?