- Environmental Chemistry 639
- Ecotoxicology 597
- Environmental Health 591
- Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution 570
- Environment, general 538
- Atmospheric Protection/Air Quality Control/Air Pollution 506
- Soil Science & Conservation 110
- Pollution, general 64
- Geochemistry 47
- Public Health 34
- Terrestrial Pollution 34
- Environmental Science and Engineering 24
- Analytical Chemistry 13
- Monitoring/Environmental Analysis 12
- Environmental Economics 8
- Environmental Engineering/Biotechnology 8
- Applied Microbiology 1
- Ecology 1
- Environmental Management 1
- Microbiology 1