- Environmental Science and Engineering 15
- Energy Policy, Economics and Management 12
- Environmental Management 11
- Geoecology/Natural Processes 9
- Geoengineering, Foundations, Hydraulics 9
- Nature Conservation 9
- Mineralogy 8
- Atmospheric Protection/Air Quality Control/Air Pollution 7
- Climatology 7
- Sustainable Development 6
- Agriculture 5
- Mathematical Modeling and Industrial Mathematics 5
- Mechanical Engineering 5
- Monitoring/Environmental Analysis 5
- Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics) 5
- Structural Geology 5
- Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution 5
- Earth System Sciences 4
- Energy Systems 4
- Fossil Fuels (incl. Carbon Capture) 4