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Deforestation and climate change
Deforestation is the second largest anthropogenic source of carbon dioxide to the atmosphere, after fossil fuel combustion. Deforestation and forest degradation contribute to atmospheric greenhouse gas emissions through combustion of forest biomass and decomposition of remaining plant material and soil carbon. It used to account for more than 20% of carbon dioxide emissions, but it’s currently somewhere around the 10% mark. By 2008, deforestation was 12% of total , or 15% if peatlands are included. These proportions are likely to have fallen since given the continued rise of fossil fuel use.
Averaged over all land and ocean surfaces, temperatures warmed roughly 1.53 °F (0.85 °C) between 1880 to 2012, according to the Intergovernmental Panel on Climate Change. In the Northern Hemisphere, 1983 to 2012 were the warmest 30-year period of the last 1400 years.
== Effect on climate change ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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