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← GeographyWhich outcome results when thermokarst lakes experience thaw?
A)Increased bacterial methanogenesis and ebullition✓
B)Decreased permafrost carbon decomposition rates
C)Stabilized slope reduces arctic landslides
D)Increased albedo offset greenhouse warming
💡 Explanation
Increased thaw leads to increased methanogenesis because anaerobic decomposition accelerates; therefore, methane ebullition becomes prevalent, rather than a decrease in decomposition. The Thermal expansion releases trapped organic matter.
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