
There have been five major extinction events in Earth's history, the fifth being the obliteration of the dinosaurs by an asteroid some 65 million years ago. For many plant and animal species today, humans are now the greatest threat to their survival. This is known as the sixth extinction, and its grim ledger is the IUCN Red List of Threatened Species. The unrestrained destruction of animal habitats for our cities and food production is the equivalent of a slow-motion asteroid. And yet, it is only the human who has the capacity to prevent a real asteroid hitting Earth.























