Answer: When permafrost is frozen, plant material in the soil—called organic carbon—can't decompose, or rot away. As permafrost thaws, microbes begin decomposing this material. This process releases greenhouse gases like carbon dioxide and methane to the atmosphere.
Explanation:
One that evoked the unspoken fears of humans
Answer:
A: The deadliest pandemic of the last 100 years.
Explanation:
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