- Ecology 3
- Earth Sciences, general 2
- Environment, general 2
- Geography, general 2
- Geology 2
- Atmospheric Protection/Air Quality Control/Air Pollution 1
- Biogeosciences 1
- Ecotoxicology 1
- Environmental Management 1
- Environmental Science and Engineering 1
- Geochemistry 1
- Hydrology/Water Resources 1
- Mineral Resources 1
- Mineralogy 1
- Monitoring/Environmental Analysis 1
- Terrestrial Pollution 1