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Subject
- Acid rain--Environmental aspects2
- Air quality1
- Air quality management3
- Altitudes3
- Atmospheric temperatures2
- Biogeography12
- Biology and Ecology4
- Biotic communities1
- Cities and towns1
- Climate4
- Climatic factors1
- Climatology, Meteorology and Atmosphere7
- Clouds1
- Conservation of natural resources1
- Digital elevation models3
- Ecological disturbances1
- Ecological risk assessment4
- Ecological zones1
- Ecosystem health1
- Elevation3