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Politics and government
4
Armed Forces
3
Climatic changes
3
International regimes
3
Climate
2
Water-supply
2
Agriculture
1
Demography
1
Diseases
1
Economics
1
Floods
1
Greenhouse gases
1
International law
1
Negotiation
1
Rivers
1
Technology
1
Wars
1
Water--Law and legislation
1
Water-power
1
