Columbia subject headings:
Air quality management--United States.
Greenhouse gases--United States--Prevention.
Industrial efficiency--United States.
Industries--Energy conservation--United States.
Harvard subject headings:
Air--Pollution--United States--Prevention.
Industries--Energy consumption--United States.
Princeton subject headings:
Greenhouse gases--Environmental aspects--United States.
Industrial efficiency--United States.
Industries--Energy conservation--United States.
Pollution prevention--United States.