Columbia subject headings:
Harvard subject headings:
Climatic changes--Government policy--United States
Climatic changes--Research--United States
Energy policy--United States
Greenhouse effect, Atmospheric--Government policy--United States.
Princeton subject headings:
Climatic changes--Government policy--United States.
Climatic changes--Research--United States.
Energy policy--United States.
Greenhouse effect, Atmospheric--Government policy--United States.