- Atmospheric Protection/Air Quality Control/Air Pollution 5
- Ecotoxicology 5
- Atmospheric Sciences 3
- Monitoring/Environmental Analysis 3
- Waste Management/Waste Technology 3
- Public Health 2
- Applications of Graph Theory and Complex Networks 1
- Computational Mathematics and Numerical Analysis 1
- Data-driven Science, Modeling and Theory Building 1
- Ecology 1
- Environmental Law/Policy/Ecojustice 1
- Geoecology/Natural Processes 1
- Geophysics and Environmental Physics 1
- Information Systems and Communication Service 1
- Math. Appl. in Environmental Science 1
- Nature Conservation 1
- Pollution, general 1