Although contemporary society is not the first to destroy the natural environment on which it relies for its survival and well-being, it is doing so to an extent never before imaginable. As Elizabeth Kolbert reports in The Sixth Extinction, humanity verges on generating a loss of species not seen since the mass extinction 66 million years ago that killed off the dinosaurs. As conditions now stand—and they could certainly get worse—“one-third of all reef-building corals, a third of all freshwater mollusks, a third of sharks and rays, a quarter of all mammals, a fifth of all reptiles, and a sixth of all birds” could face extinction. No place on the planet is safe from this die-off: “The losses are occurring all over: in the South Pacific and in the North Atlantic, in the Arctic and the Sahel, in lakes and on islands, on mountaintops and in valleys.” - See more at: http://greattransition.org/publication/mass-extinction-is-the-enemy-us#sthash.5tOWABdA.dpuf