Columbia subject headings:
Environmental protection--United States.
Pollution--United States.
Recycling (Waste, etc.)--United States.
Refuse and refuse disposal--United States.
Harvard subject headings:
Incineration--United States.
Refuse and refuse disposal
Refuse and refuse disposal--United States
Sanitary landfills--United States.
Princeton subject headings:
Incineration--United States.
Refuse and refuse disposal--United States.
Sanitary landfills--United States.