Subject
ecology
forest decline
7
biotope
2
ecosystem
2
environmental impact
2
global change
2
rain forest
2
tropics
2
vegetation
2
acid rain
1
air pollution
1
climatic change
1
climatic effect
1
ecological biochemistry
1
ecological microbiology
1
environmental balance
1
environmental health
1
environmental policy
1
environmental pollution
1
forest
1
global optimization
1
nature conservation
1
nitration
1
nitrogen cycle
1
ozonation
1
ozone
1
plant protection
1
soil protection
1
soil science
1
spruce
1