Subject
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Case studies
7
Catalogues
2
Cellulose
1
Cement
2
Cement materials
1
Ceramic materials
1
Certification
1
Chaparral
1
Chemicals
2
Chemistry
1
Children
1
Christmas greens
1
Christmas tree growing
3
Christmas tree industry
2
Christmas trees
6
Chromite ores
1
Citizen participation
2
City planning
2
Classification
8
Clay minerals
1
Clays
1
Clean coal
2
Clearcutting
2
Clearing of land
1
Climate
7
Climate change
4
Climatic changes
2
Coal
24
Coal Mines
13
Coal deposits
3
Coal fields
1
Coal gasification
3
Coal industry
1
Coal liquefaction
2
Coal mines
2
Coal mines and mining
1
Coal mining
6
Coal preparation
5
Coal refuse
2
Coal reserves
1
Coal resources
1
Coal utilization
3
Coalbed methane
4
Coalification
1
Coastal areas
14
Coastal environment
14
Coastal zone Management
1
Coastlines
1
Collecting
2
Colluvium
1
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