Topic
General Earth and Planetary Sciences
23
Earth-Surface Processes
18
Ecology
18
Geography, Planning and Development
18
Arts and Humanities (miscellaneous)
5
Law
3
Political Science and International Relations
3
Aquatic Science
2
Health, Toxicology and Mutagenesis
1
Management, Monitoring, Policy and Law
1
Nature and Landscape Conservation
1
Pollution
1
Water Science and Technology
1