Subject
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Coal
4
Control
4
Ecological disturbances
4
Economic aspects
4
Evaluation
4
Forest fires
4
Forest machinery
4
Forest soils
4
Forests
4
Habitats
4
Pollution
4
SURVEYS
4
Spruce
4
Woodlots
4
Acid rain
3
Biology
3
Biomass energy
3
Birds
3
Christmas tree growing
3
Christmas trees
3
Current Research
3
Demographics
3
Development
3
Ecosystems
3
Fir
3
Forest damage
3
Forest industry
3
Fuelwood
3
Glyphosate
3
Government policy
3
Habitat
3
Hardwoods
3
Manuals
3
Measurement
3
Methodology
3
Models
3
Norway spruce
3
Old growth forests
3
Planning
3
Prevention and control
3
Programs
3
Recreational use
3
Red pine
3
Research and development
3
Sustainable development
3
Technology
3
Wildlife conservation
3
Wood
3
Administrative responsibility
2
Air
2
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