Columbia subject headings:
Climatic changes--Government policy--United States.
Environmental policy--United States.
Greenhouse gas mitigation--International cooperation.
Greenhouse gas mitigation--United States.
United States--Foreign relations--2001-2009.
Harvard subject headings:
Climatic changes--Government policy--United States
Environmental policy--United States
Greenhouse gas mitigation--International cooperation
Greenhouse gas mitigation--United States
United States--Foreign relations--2001-2009.
Princeton subject headings:
Climatic changes--Government policy--United States.
Environmental policy--United States.
Greenhouse gas mitigation--International cooperation.
Greenhouse gas mitigation--United States.
United States--Foreign relations--2001-2009.