Columbia subject headings:
Carbon dioxide.
Fossil fuels--Taxation--United States.
Global warming.
Greenhouse effect, Atmospheric.
Harvard subject headings:
Carbon dioxide.
Fossil fuels--Taxation--United States.
Global warming.
Greenhouse effect, Atmospheric.
Princeton subject headings:
Carbon dioxide.
Fossil fuels--Taxation--United States.
Global warming.
Greenhouse effect, Atmospheric.