• as a physician I examine the dying planet as I do a dying patient. The earth has a natural system of interacting homeostatic mechanisms similar to the human body's. If one system is diseased, like the ozone layer, then other systems develop abnormalities in function - the crops will die, the plankton will be damaged, and the eyes of all creatures on the planet will become diseased and vision impaired.

    Helen Caldicott (2009). “If You Love This Planet: A Plan to Save the Earth (Revised and updated)”, p.13, W. W. Norton & Company