Columbia subject headings:
Atmosphere.
Climatic changes.
Greenhouse effect, Atmospheric--Atmosphere.
Harvard subject headings:
Climatic changes
Climatic changes--Government policy
Climatic changes--International cooperation
Energy policy
Fossil fuels--Environmental aspects.
Global warming
Greenhouse effect, Atmospheric
Princeton subject headings:
Climatic changes--Government policy.
Climatic changes--International cooperation.
Climatic changes.
Energy policy.
Fossil fuels--Environmental aspects.
Global warming.
Greenhouse effect, Atmospheric.