Subfield
- Urban Studies18
- Waste Management and Disposal16
- Forestry15
- General Agricultural and Biological Sciences15
- Pollution15
- Soil Science13
- Geography, Planning and Development12
- Global and Planetary Change10
- Renewable Energy, Sustainability and the Environment9
- Aquatic Science8
- Parasitology8
- Insect Science7
- Nature and Landscape Conservation7
- Applied Mathematics6
- Health Information Management6
- Statistics and Probability6
- Energy Engineering and Power Technology5
- Environmental Chemistry5
- Gender Studies5
- Geometry and Topology5