marine
(
132
)
canada
(
106
)
pnw
(
100
)
beaufort sea
(
99
)
northwest territories
(
84
)
oil and gas industry
(
42
)
environmental aspects
(
39
)
oil spills
(
39
)
environmental impact
(
38
)
sea ice
(
28
)
arctic
(
24
)
drilling
(
23
)
environmental effects
(
20
)
oil and gas exploration
(
20
)
dredging
(
19
)
petroleum
(
19
)
aerial surveys
(
18
)
oil wells
(
18
)
offshore
(
17
)
mckinley bay
(
16
)
franklin district
(
15
)
geographical distribution
(
15
)
marine mammals
(
15
)
environmental impact analysis
(
14
)
offshore oil industry
(
14
)
sociological aspects
(
13
)
abundance
(
12
)
offshore structures
(
12
)
oil removal
(
12
)
pipelines
(
12
)