- Environmental Management 27
- Energy Policy, Economics and Management 25
- Climate Change/Climate Change Impacts 20
- Biomedicine general 13
- Life Sciences, general 13
- Sustainable Development 9
- Environmental Economics 5
- Environmental Geography 4
- Environment, general 3
- Ecology 2
- Political Science 2
- Social Sciences, general 2
- Atmospheric Protection/Air Quality Control/Air Pollution 1
- Atmospheric Sciences 1
- Biodiversity 1
- Bioinformatics 1
- Business Ethics 1
- Business Strategy/Leadership 1
- Business Taxation/Tax Law 1
- Business and Management, general 1