Columbia subject headings:
Energy development--Environmental aspects.
Energy policy.
Environmental policy.
Federal aid to energy development--Case studies.
Federal aid to transportation--Case studies.
Subsidies--Case studies.
Transportation and state.
Transportation--Environmental aspects.
Harvard subject headings:
Energy development--Environmental aspects
Energy policy
Environmental policy
Federal aid to energy development--Case studies.
Federal aid to transportation--Case studies.
Subsidies--Case studies.
Transportation and state.
Transportation--Environmental aspects.
Princeton subject headings:
Energy development--Environmental aspects.
Federal aid to energy development--Case studies.
Federal aid to transportation--Case studies.
Subsidies--Case studies.
Transportation--Environmental aspects.