Agriculture & Biology
politics
100%
economic systems
68%
climate
55%
socioeconomics
47%
history
35%
fuel combustion
35%
hydrology
31%
historical records
31%
environmental degradation
30%
degradation
28%
deforestation
28%
global change
27%
fossil fuels
27%
water management
26%
sea level
25%
human population
25%
engineers
24%
global warming
24%
food production
23%
food security
23%
wetlands
22%
population growth
21%
human health
21%
soil water
19%
Earth & Environmental Sciences
Anthropocene
91%
political system
76%
environmental change
60%
social system
42%
economic system
41%
environmental degradation
38%
climate
28%
history
19%
historical record
19%
food production
18%
food security
17%
human population
17%
deforestation
16%
sea level rise
16%
fossil fuel
15%
water management
15%
conflict
15%
global warming
14%
hydrology
14%
human health
14%
soil water
14%
wetland
13%
erosion
11%
degradation
11%
world
10%