Translations:Adventist Youth Honors Answer Book/Nature/Climate Science - Advanced/18/en
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Permafrost contains plant material in soil, which has not decomposed. As a result, when it begins to thaw, decomposition takes place by means of microbes. This process releases greenhouse gases into the atmosphere like methane and carbon dioxide. In addition, bacteria and viruses from long ago are also released, which can make humans and wildlife sick with little ability to develop proper treatment to protect the immune system.
