- Chemistry/Food Science, general 5
- Energy, general 3
- Engineering, general 3
- Medicine/Public Health, general 3
- Pollution, general 3
- Sustainable Development 3
- Bioinformatics 2
- Complex Systems 2
- Earth Sciences, general 2
- Economics, general 2
- Geology 2
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- Probability Theory and Stochastic Processes 2
- Catalysis 1
- Industrial Chemistry/Chemical Engineering 1
- Industrial Pollution Prevention 1
- Inorganic Chemistry 1
- Nanochemistry 1
- Organic Chemistry 1