Subject
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Public lands
6
Public opinion
6
Salt
6
Waste disposal
6
Abandoned Mines
5
Analysis
5
Basins
5
Biodiversity
5
Control methods
5
Emissions
5
Evaluation
5
Feasibility studies
5
Fire ecology
5
Fish
5
Forest damage
5
Forest fires
5
Forest products industry
5
Government policy
5
Igneous rocks
5
Land management
5
Mineral exploration
5
Mineralization
5
Pests
5
Petroleum geology
5
Population
5
Research and development
5
Resource management
5
Salt domes
5
Shrubs
5
Spruce
5
Sustainable development
5
Technology
5
Trapping
5
Waterfowl
5
Wetland ecology
5
Wood chips
5
Wood products
5
Biology
4
Botany
4
Christmas trees
4
Coal refuse
4
Coalbed methane
4
Concrete
4
Conservation of natural resources
4
Cost
4
Damage
4
Deer
4
Defoliation
4
Deformation
4
Drilling
4
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