The Cause of Extinction: Humans; Blog # 5

There have been five mass extinctions in the history of the Earth. Most of them where caused by natural climate change. The others are thought to have been caused by either the movement of techonic plates, volcanoe erruptions, or a collition between Earth and a comet. But it is thought that a sixth mass extinction is rapidly headed towards Earth. It is also believed that humans are causing this extiction. The things that humans are doing to upset the ecosystem are transforming landscapes, introducing alien species to enviroments, the overexploitation of species, and polution. These things are quickly changing the Earths climate, and if history is to repeat itself (as it allows does) when the Earth's climate changes quickly a mass extinction is bound to happen.