Subject
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Classification
5
Clean coal
1
Clearcutting
6
Climate
3
Climate change
9
Climatic changes
1
Climatology
1
Coal
3
Coal Mines
1
Coal industry
2
Coal mine waste
1
Coal mines and mining
2
Coal preparation
1
Coal--Environmental aspects
1
Coal--Research
1
Coast changes
1
Coastal areas
2
Coastal environment
1
Coastal zone Management
1
Coastlines
2
Coasts
1
Cohasset
2
Collection and preservation
1
Combustion
1
Common snipe
1
Communication
1
Companies
1
Competition
1
Computer Programs
1
Computer modeling
1
Computer programs
1
Congresses
1
Conifers
3
Conservation
28
Conservation areas
2
Conservation biology
1
Conservation of natural resources
3
Control
2
Cost
1
Cougars
2
Coyote
2
Coyotes
2
Crafts
1
Crown land
22
Crown lands
62
Cutover lands
1
Cutting
2
DDT (Insecticide)
1
Darwin, Charles, 1809-1882
1
Data
1
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