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← GeographyWhich risk increases when buildings are constructed on discontinuous permafrost regions?
A)Methane release from thawing hydrates
B)Accelerated weathering due to ice formation
C)Localized subsidence due to thermokarst✓
D)Increased albedo amplifying solar radiation
💡 Explanation
When ground thaws beneath structures in a discontinuous permafrost area, thermokarst develops because thawing reduces soil strength & volume, leading to uneven settling. Therefore localized subsidence risks increase, rather than methane release, acceleratred weathering, or increased albedo, each requiring other distinct environmental drivers.
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