Which outcome occurs when thermokarst lake expansion destabilizes Arctic pipeline supports embedded within permafrost?

💡 Explanation

When thermokarst lakes expand, the permafrost thaws due to increased heat transfer, leading to the release of stored organic matter and subsequent microbial decomposition into methane. Therefore increased methane release occurs, rather than changes in insulation, corrosion or pumping efficiency which are influenced by factors independent of thawing permafrost.

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