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ALASKA
*ENVIRONMENTAL IMPACT
3
Ecology
3
Hydrology
3
Limnology and Potamology
3
PERMAFROST
3
VEGETATION
3
*GROUND WATER
2
*WETLANDS
2
SUBSURFACE
2
SUMMER
2
TANANA FLATS
2
WETLANDS
2
*AERIAL RECONNAISSANCE
1
*AIRBOATS
1
*ALASKA
1
*ALL TERRAIN VEHICLES
1
*ATMOSPHERIC TEMPERATURE
1
*CRUDE OIL
1
*DAMAGE
1
*OFFROAD TRAFFIC
1
*OIL SPILLS
1
*PERMAFROST
1
*TUNDRA
1
AIR CUSHION VEHICLES
1
ALASKA NORTH SLOPE
1
ALKALINITY
1
ASPHALT
1
BIRDS
1
BLADDERWORT
1
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