Environmental

Which of the following is a primary concern for real estate construction on permafrost in Alaska?

AExcessive drainage causing dry conditions
BHeat from buildings causing permafrost to thaw and ground to subside✓ Correct
CExtreme frost heave only in summer months
DIncreased earthquake risk due to frozen ground

Explanation

Heat conducted from buildings can thaw the underlying permafrost, causing the ground to lose its structural integrity and subside. This 'thermokarst' process can severely damage or destroy structures. Proper construction uses elevated foundations, pile systems, or refrigerated foundations to prevent heat transfer.

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