Agriculture & Biology
globalization
97%
terrestrial ecosystems
93%
ecosystems
56%
nitrogen
43%
fuel combustion
37%
gas emissions
35%
fossil fuels
29%
temperate zones
27%
anthropogenic activities
26%
topography
26%
uncertainty
24%
leaching
24%
land use
24%
climate
19%
species diversity
19%
history
19%
plant growth
18%
soil
12%
Earth & Environmental Sciences
globalization
86%
terrestrial ecosystem
75%
ecosystem type
49%
nitrogen
44%
ecosystem
44%
trace gas
40%
fossil fuel
34%
combustion
28%
leaching
28%
topography
27%
land use
25%
demand
24%
history
21%
climate
20%
loss
19%
soil
15%
distribution
13%
rate
12%
Medicine & Life Sciences
Internationality
100%
Ecosystem
83%
Nitrogen
74%
Fossil Fuels
31%
Climate
21%
Soil
20%
Fertilization
20%
Uncertainty
17%
Gases
15%
History
14%
Growth
9%
Social Sciences
globalization
54%
land use
37%
climate
29%
uncertainty
28%
geography
27%
demand
25%
history
20%
Chemical Compounds
Ecosystem
89%
Nitrogen
45%
Plant Growth
25%
Fossil Fuel
22%
Leaching
16%
Soil
15%