Topic
Geography, Planning and Development
General Earth and Planetary Sciences
32
Ecology
29
Earth-Surface Processes
25
Archeology
2
General Agricultural and Biological Sciences
2
History
2
Earth and Planetary Sciences (miscellaneous)
1
Environmental Engineering
1
Management, Monitoring, Policy and Law
1
Philosophy
1
Religious studies
1
Safety, Risk, Reliability and Quality
1
Water Science and Technology
1