Columbia subject headings:
Recycling (Waste, etc.)--United States.
Refuse and refuse disposal--United States.
Salvage (Waste, etc.)--United States.
Tax incentives--United States.
Harvard subject headings:
Recycling (Waste, etc.)--United States.
Refuse and refuse disposal--United States
Salvage (Waste, etc.)--United States.
Tax incentives--United States.
Princeton subject headings:
Recycling (Waste, etc.)--Government policy--United States.
Refuse and refuse disposal--Government policy--United States.