Subject
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Biology
2
Chemistry
2
Children
2
Coal Mines
2
Coal mining
2
Deposition
2
Earthquakes
2
Ecosystems
2
Engineering geology
2
Environmental protection
2
Forest management
2
Forest nurseries
2
Forests and forestry
2
Grapes
2
Harvesting
2
Identification
2
Land classification
2
Landscapes
2
Manuals
2
Maps
2
Methodology
2
Mining
2
Organic materials
2
Parks
2
Peat
2
Pine
2
Regeneration
2
Research
2
Rock mechanics
2
Rocks
2
Sampling
2
Silviculture
2
Soil analysis
2
Soil conservation
2
Soil erosion
2
Soil sampling
2
Spruce
2
Strip mining
2
Surface mining
2
Teaching materials
2
Terroir
2
Testing
2
Topography
2
Trace elements
2
Viticulture
2
Water quality
2
Woodlots
2
Acid mine drainage
1
Acid pollution of rivers, lakes, etc
1
Acid precipitation (Meteorology)
1
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