Topic
Geochemistry and Petrology
4
General Earth and Planetary Sciences
3
Geophysics
3
Oceanography
3
Aquatic Science
2
Earth and Planetary Sciences (miscellaneous)
2
General Environmental Science
2
Geology
2
Space and Planetary Science
2
Condensed Matter Physics
1
Earth-Surface Processes
1
Ecology
1
Ecology, Evolution, Behavior and Systematics
1
Energy Engineering and Power Technology
1
Fuel Technology
1
Renewable Energy, Sustainability and the Environment
1