Agriculture & Biology
growers
76%
tobacco
70%
ecosystems
63%
Tanzania
33%
Brazil
25%
farming systems
19%
curing (nonfood products)
18%
child labor
14%
family farms
10%
labor force
9%
energy
9%
livelihood
8%
Taiwan
7%
production costs
7%
statistics
7%
labor
6%
Germany
6%
protocols
5%
farmers
5%
economics
5%
leaves
3%
Social Sciences
diversification
87%
nicotine
80%
Tanzania
32%
Brazil
22%
production costs
10%
child labor
9%
energy source
9%
study group
7%
testimony
7%
livelihood
7%
farm
7%
farmer
6%
political economy
6%
Taiwan
6%
UNO
5%
statistics
5%
Federal Republic of Germany
5%
labor
5%
energy
5%
narrative
4%
costs
4%
trend
3%
economics
3%
Earth & Environmental Sciences
tobacco
100%
ecosystem
49%
comparison
35%
convention
32%
child labor
13%
family farm
12%
political economy
10%
production cost
8%
energy source
7%
livelihood
7%
labor
7%
developing world
6%
protocol
6%
statistics
5%
Europe
5%
public
5%
economics
4%
world
4%
cost
3%
trend
3%
energy
3%