- Soil Science & Conservation 4
- Agriculture 3
- Ecology 3
- Environment, general 2
- Science, Humanities and Social Sciences, multidisciplinary 2
- Science, multidisciplinary 2
- Atmospheric Protection/Air Quality Control/Air Pollution 1
- Bioinformatics 1
- Ecotoxicology 1
- Environmental Chemistry 1
- Environmental Health 1
- Environmental Physics 1
- Medical Microbiology 1
- Microbial Ecology 1
- Microbial Genetics and Genomics 1
- Microbiology 1
- Virology 1
- Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution 1