Topic
General Earth and Planetary Sciences
410
Geography, Planning and Development
242
Ecology
203
General Environmental Science
64
General Agricultural and Biological Sciences
50
Ecology, Evolution, Behavior and Systematics
35
Aquatic Science
30
Atmospheric Science
9
Geophysics
9
Aerospace Engineering
8
Arts and Humanities (miscellaneous)
8
Astronomy and Astrophysics
8
Earth-Surface Processes
8
Geotechnical Engineering and Engineering Geology
8
Space and Planetary Science
8
General Engineering
4
Electrical and Electronic Engineering
3
Geology
3
Stratigraphy
3
Archeology
2
Earth and Planetary Sciences (miscellaneous)
2
Water Science and Technology
2
Condensed Matter Physics
1
Environmental Chemistry
1
Nature and Landscape Conservation
1