Subfield
- Waste Management and Disposal48
- Applied Mathematics46
- Pollution40
- Management, Monitoring, Policy and Law39
- Water Science and Technology34
- Energy Engineering and Power Technology28
- Global and Planetary Change21
- Renewable Energy, Sustainability and the Environment19
- Computer Networks and Communications17
- Information Systems17
- Civil and Structural Engineering14
- Media Technology13
- Theoretical Computer Science13
- Safety, Risk, Reliability and Quality11
- Environmental Chemistry10
- Mechanics of Materials10
- Geochemistry and Petrology9
- Health, Toxicology and Mutagenesis9
- Nature and Landscape Conservation9
- Building and Construction8