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Human Impacts, Climate Change, and Conservation
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Biology
10.99 Human Impacts, Climate Change, and Conservation
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Which sequence best describes a positive climate feedback involving permafrost?
A
Warming freezes permafrost, which removes all greenhouse gases
B
Warming thaws permafrost, thawing releases greenhouse gases, and added greenhouse gases increase warming
C
Thawing permafrost stops microbial activity permanently
D
Greenhouse gases reduce warming by trapping less heat
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