Table 1. Amount of the forest land base in a nonforest state in 2002 affected by industrial disturbance.

Type of disturbance  
Area (ha)
Seismic lines  
41,082
Pipelines  
22,258
Roads (minor)  
20,000
Pasture grass  
19,992
Wellsites  
15,516
Roads (major )  
11,606
Roads (wellsite)  
7346
Oil- sand surface mine  
5829
Recreation areas  
3100
In-block losses  
2800
Towns  
2460
Miscellaneous agriculture  
1809
Transmission lines  
1000
Peat mine  
234
Miscellaneous
  
130
Total disturbed area  
155,162