- Zoology 6
- Veterinary Medicine/Veterinary Science 5
- Transgenics 2
- Atmospheric Protection/Air Quality Control/Air Pollution 1
- Climate Change/Climate Change Impacts 1
- Ecology 1
- Environment, general 1
- Freshwater & Marine Ecology 1
- Hydrogeology 1
- Soil Science & Conservation 1
- Water Quality/Water Pollution 1