Subject
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Power generation
2
Precambrian
1
Pyrite
1
Pyrolysis
1
Quarries
1
Recreation
1
Research and development
2
Rivers
1
Safety
2
Science
1
Social aspects
1
Species at risk
1
Spruce budworm
3
Sulfur
1
Sulfur dioxide
1
Sydney Basin
1
Sydney coalfield
1
Tectonics
1
Water Supply
1
Water quality
1
Wilderness areas
1
Woodlots
1