Subject
Earth sciences.
Geophysics.
61
Atmospheric sciences.
41
Oceanography.
36
Physics.
29
Astrophysics.
27
Hydrogeology.
26
Planetology.
26
Geochemistry.
21
Space sciences.
19
Astronomy
18
Observations, Astronomical.
18
Mineralogy.
15
Environment.
12
Geography.
12
Geotechnical engineering.
12
Chemistry.
11
Geology.
10
Sedimentology.
9
Air pollution.
8
Structural geology.
8
Environmental management.
7
Mechanics.
7
Physical chemistry.
7
Soil science.
7
Continuum physics.
5
Dynamical systems.
5
Fluids.
5
Planetary meteorology.
5
Space environment.
5
Statistical physics.
5
Automotive engineering.
4
Bioinformatics.
4
Chemical engineering.
4
Engineering geology.
4
Fossil fuels.
4
Soil conservation.
4
Agriculture.
3
Astronomy.
3
Biochemistry.
3
Civil engineering.
3
Cogeneration of electric power and heat.
3
Condensed matter.
3
Economic geology.
3
Environmental sciences.
3
Geographical information systems.
3
Hydrology.
3
Inorganic chemistry.
3
Materials science.
3
Optics.
3
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