Subject
air pollution
1
animal
1
atmosphere
1
carbon dioxide
1
climate
1
climate modification
coastal region
1
cryosphere
1
desertification
1
environmental balance
environmental research
1
erosion
1
geomorphology
1
greenhouse effect
1
groundwater
1
human behavior
1
hydrology
1
ozone
1
river
1
soil
1
soil pollution
1
soil protection
1
urban planning
1
vegetation
1
water
1
water pollution
1
water protection
1