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Subject
- Global warming268
- Climatic changes262
- Globalization191
- Government policy115
- Research97
- Global temperature changes93
- Greenhouse effect, Atmospheric87
- Economic aspects82
- Global Positioning System77
- Environmental aspects72
- Greenhouse gases62
- Global Financial Crisis, 2008-200961
- Global environmental change47
- Social aspects45
- History39
- International cooperation38
- Environmental policy37
- U.S. Global Change Research Program33
- United States32
- Economic conditions28