Columbia subject headings:
Harvard subject headings:
Carbon dioxide mitigation--Government policy--United States.
Energy conservation--United States
Energy policy--United States
Renewable energy sources--United States
Princeton subject headings:
Clean energy--Government policy.
Climate change mitigation--Government policy.
Climatic changes--Government policy.
Environmental policy--International cooperation.
Greenhouse gas mitigation--Government policy.
Greenhouse gases--Environmental aspects.
Science and state.