Subject
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Pollution
71
Resource management
71
Black spruce
70
Forest thinning
70
Peat
70
Plants
70
Sustainability
70
GOVERNMENT
69
Protected areas
69
Wilderness areas
69
Seedlings
67
Technology
66
Coal Mines
65
Development
65
Electric power
65
Outdoor recreation
65
Mineral deposits
64
Timber
64
Water quality
64
Wood
64
Forest inventories
63
Production
63
Biomass energy
62
Clearcutting
62
Mines and mineral resources
62
Pipelines
62
Testing
62
Beaches
61
Christmas trees
61
Hunting
61
White spruce
61
Forest site quality
60
Tectonics
60
Agriculture
59
Children
59
Forest industry
59
Maps
59
Mineral Resources
59
Taxes
59
Combustion
57
Models
57
Research and development
57
Supply and demand
57
Climate change
56
Biomass
54
Environmental policy
54
Forest conservation
54
Herbicides
54
Mathematical models
54
Safety
54
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