Changes in air temperature, the atmosphere of the earth is constantly moving (Dynamic) Earth's climate has changed over time, some long, some short. Depending on numerous factors such as volcanic activity causes climate change just over a month or a year. Being struck by a meteor caused the change for several decades. The increase of air pollution pose the centuries. Changes in ocean currents and the size of the ice sheet. As well as changes in Earth's orbit. Causes periodic changes millions of years. The movement of continents and the transition of power from the sun.
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