It is called "Earth Cyclical Climate change". This "Global Warming" is all a big scam , aimed at extracting carbon monoxide money from third world nations, and slowing their development. The Earth has gone through these cycles many times over, during its billions year history. "Global Warming" is nothing but an elaborate scam , that is being implemented by the industrialized nations of the world. Volcanoes, and the ocean, all release more CO2, and Methane, than humans have ever produced. These natural emissions , have been affecting the temperature on Earth , weather hot or cold , for many millions of years.