- Geochemistry 14
- Microbiology 8
- Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution 8
- Ecotoxicology 7
- Environmental Management 7
- Water Quality/Water Pollution 7
- Soil Science & Conservation 5
- Biogeosciences 4
- Medicinal Chemistry 4
- Mineralogy 4
- Nanoscale Science and Technology 4
- Analytical Chemistry 1
- Earth Sciences, general 1
- Earth System Sciences 1
- Environmental Chemistry 1
- Geology 1
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- Terrestrial Pollution 1
- Waste Management/Waste Technology 1