- Atmospheric Protection/Air Quality Control/Air Pollution 4
- Environment, general 4
- Ecotoxicology 3
- Environmental Chemistry 3
- Environmental Health 3
- Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution 3
- Artificial Intelligence 2
- Computational Intelligence 2
- Atomic, Molecular, Optical and Plasma Physics 1
- Classical and Continuum Physics 1
- Climate Change/Climate Change Impacts 1
- Complexity 1
- Computer Science, general 1
- Condensed Matter Physics 1
- Control, Robotics, Mechatronics 1
- Data Structures and Information Theory 1
- Ecology 1
- Economic Geology 1
- Economic Growth 1
- Environmental Economics 1