- Science, Humanities and Social Sciences, multidisciplinary 27
- Atmospheric Protection/Air Quality Control/Air Pollution 26
- Environment, general 26
- Ecotoxicology 24
- Science, multidisciplinary 24
- Environmental Chemistry 21
- Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution 21
- Environmental Health 19
- Metallic Materials 19
- Characterization and Evaluation of Materials 16
- Plant Sciences 16
- Biochemistry, general 14
- Biotechnology 14
- Computer Applications 14
- Ecology 14
- Internal Medicine 14
- Artificial Intelligence 13
- Chemistry/Food Science, general 13
- Engineering, general 13
- Microbiology 13