Carbon dioxide released into the atmosphere comes from humans burning fossil fuel us from energy production and transport are the main. In addition, changes in land use and deforestation also causes. For example, the tree is "absorbs" carbon ". By nature, by absorbing carbon dioxide, when alive, and once destroyed will release carbon dioxide into the atmosphere. When carbon dioxide in the atmosphere, and then persist for 50 to 200 years, and some remain forever.
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