- Electrochemistry 12
- Renewable and Green Energy 12
- Catalysis 11
- Agriculture 7
- Plant Sciences 6
- Environment, general 3
- Environmental Chemistry 3
- Science, Humanities and Social Sciences, multidisciplinary 3
- Ecology 2
- Science, multidisciplinary 2
- Soil Science & Conservation 2
- Atmospheric Protection/Air Quality Control/Air Pollution 1
- Biochemistry, general 1
- Biomedicine, general 1
- Biotechnology 1
- Characterization and Evaluation of Materials 1
- Civil Engineering 1
- Computer Communication Networks 1
- Computer Science, general 1
- Condensed Matter Physics 1