Please note this is a region 2 DVD and will require a region 2 (Europe) or region Free DVD Player in order to play. Over three programmes David Attenborough travels from Kenya to California, investigating the contesting claims about the current state of our planet. In the first programme he examines the extinction crisis, measuring the disappearance of some species against the mass of life that still remains undiscovered; in the second, he explores this crisis further, examining its causes; and finally, in the third, he looks at the possible courses of action open to us in the coming century.