- Geology 7
- Environmental Science and Engineering 6
- Geotechnical Engineering & Applied Earth Sciences 6
- Hydrogeology 6
- Hydrology/Water Resources 6
- Biogeosciences 5
- Geochemistry 5
- Terrestrial Pollution 5
- Civil Engineering 4
- Geophysics/Geodesy 4
- Ecotoxicology 3
- Environmental Management 3
- Mineral Resources 3
- Natural Hazards 3
- Earth Sciences, general 2
- Industrial Pollution Prevention 2
- Water Quality/Water Pollution 2
- Atmospheric Protection/Air Quality Control/Air Pollution 1
- Classical and Continuum Physics 1
- Energy, general 1