Subject
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Carbon dioxide
1
Case studies
1
Cats
1
Christmas tree growing
3
Christmas tree industry
3
Christmas trees
7
Civil service
1
Classification
4
Clearcutting
3
Climate
1
Climate change
5
Coal
2
Coal Mines
1
Coal industry
2
Coal preparation
1
Coastal environment
1
Coastlines
1
Collection and preservation
1
Combustion
1
Communication
1
Competition
1
Computer Programs
1
Conifers
3
Conservation
12
Conservation areas
1
Conservation of natural resources
1
Control
1
Cost
1
Cougars
1
Crown land
18
Crown lands
54
Cutover lands
1
Cutting
2
DDT (Insecticide)
1
Darwin, Charles, 1809-1882
1
Data
1
Data processing
1
Databases
1
Decision-making
1
Deer
5
Deer populations
1
Demand
1
Demographics
1
Demonstration forests
1
Design
2
Design and construction
8
Desulferization
1
Development
4
Diseases
1
Diseases and pests
3
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