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(*PERMAFROST
1
(*SOILS
1
ALASKA
1
ARCTIC SOILS
1
BUILDINGS
BULLDOZERS
1
CRACKS
1
DAMAGE
1
DEGRADATION
1
DRAINAGE
1
EROSION)
FIRES
1
FOUNDATIONS(STRUCTURES)
1
ICE
1
Ice and Permafrost
1
MELTING
1
PEAT
1
PENETRATION
1
PLANTS(BOTANY)
1
STRESSES)
1
SWAMPS
1
Snow
1
Soil Mechanics
1
TERRAIN
1
TUNDRA
1
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