42
geology
× 18 |
8
geomorphology
× 2 |
5
world-building
|
3
groundwater
|
24
volcanology
× 5 |
8
sea-level
× 2 |
4
geothermal-heat
× 2 |
3
dams
|
16
plate-tectonics
× 3 |
7
ocean
× 4 |
4
soil
× 2 |
3
hydrology
|
15
oceanography
× 5 |
7
glaciation
× 2 |
4
salinity
|
3
evaporation
|
14
water
× 3 |
7
fossils
× 2 |
4
crust
|
3
ecology
|
13
glaciology
× 2 |
7
air
|
3
biogeochemistry
× 2 |
3
geobiology
|
12
climate-change
× 5 |
7
pollution
|
3
soil-moisture
× 2 |
2
geography
× 2 |
12
earthquakes
× 2 |
7
ice
|
3
islands
|
2
geochemistry
× 2 |
10
rocks
× 4 |
6
atmosphere
× 6 |
3
co2
|
2
minerals
× 2 |
8
meteorology
× 5 |
6
sedimentology
× 2 |
3
fossil-fuel
|
2
vegetation
|
8
mineralogy
× 4 |
6
glacier
|
3
coal
|
2
volcanic-eruption
|
8
geophysics
× 4 |
5
climate
× 3 |
3
erosion
|
2
geodynamics
|
8
paleontology
× 2 |
5
volcanic-hazard
× 2 |
3
tropical-cyclone
|
2
volcanoes
|
